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SUBPART B -- LIST OF AMC-20 ITEMS
Available versions for ERULES-1963177438-17859
ED Decision 2021/007/R
found in: AMC-20 Amdt 22 - Airworthiness of Products, Parts and Appliances (May 2021)
ED Decision 2020/010/R
found in: AMC-20 Amdt 21 - Airworthiness of Products, Parts and Appliances (Apr 2021)
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### SUBPART B — LIST OF AMC-20 ITEMS ED Decision 2021/007/R INDEX 1 <table border="1" cellpadding="0" cellspacing="0"><tr><td valign="top" width="112"><p align="left"><b>EASA AMC-20 reference</b></p></td><td valign="top" width="342"><p align="left"><b>Title</b></p></td><td valign="top" width="144"><p><b>Last amended by</b></p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701657975">AMC 20-1A</a></b></p></td><td valign="top" width="342"><p>The Certification of Aircraft Propulsion Systems Equipped with Electronic Controls</p></td><td valign="top" width="144"><p>AMC-20 Amdt 19</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701657976">AMC 20-2B</a></b></p></td><td valign="top" width="342"><p>The Certification of Essential APUs Equipped with Electronic Controls</p></td><td valign="top" width="144"><p>AMC-20 Amdt 19</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701657980">AMC 20-3B</a></b></p></td><td valign="top" width="342"><p>The Certification of Engines Equipped with Electronic Engine Control Systems</p></td><td valign="top" width="144"><p>AMC-20 Amdt 19</p></td></tr><tr><td valign="top" width="112"><p>AMC 20-4A</p></td><td valign="top" width="342"><p>Airworthiness Approval and Operational Criteria For the Use of Navigation Systems in European Airspace Designated For Basic RNAV Operations</p></td><td valign="top" width="144"><p>Cancelled<br/> (By AMC-20 Amdt 17)</p></td></tr><tr><td valign="top" width="112"><p>AMC 20-5</p></td><td valign="top" width="342"><p>Airworthiness Approval and Operational Criteria for the use of the Navstar Global Positioning System (GPS)</p></td><td valign="top" width="144"><p>Cancelled<br/> (By AMC-20 Amdt 17)</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701657981">AMC 20-6</a></b> rev 2</p></td><td valign="top" width="342"><p>Extended Range Operation with Two-Engine Aeroplanes ETOPS Certification and Operation</p></td><td valign="top" width="144"><p>AMC-20 Amdt 7</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701657998">AMC 20-8A</a></b></p></td><td valign="top" width="342"><p>Occurrence Reporting</p></td><td valign="top" width="144"><p>AMC-20 Amdt 19</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701657999">AMC 20-9</a></b></p></td><td valign="top" width="342"><p>Acceptable Means of Compliance for the Approval of Departure Clearance via Data Communications over ACARS.</p></td><td valign="top" width="144"><p>AMC-20 Amdt 1</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658002">AMC 20-10</a></b></p></td><td valign="top" width="342"><p>Acceptable Means of Compliance for the Approval of Digital ATIS via Data Link over ACARS.</p></td><td valign="top" width="144"><p>AMC-20 Amdt 1</p></td></tr><tr><td valign="top" width="112"><p>AMC 20-11</p></td><td valign="top" width="342"><p>Acceptable Means of Compliance for the Approval of use of Initial Services for Air Ground Data Link in Continental Airspace</p></td><td valign="top" width="144"><p>Cancelled<br/> (by AMC-20 Amdt 11)</p></td></tr><tr><td valign="top" width="112"><p>AMC 20-12</p></td><td valign="top" width="342"><p>Recognition of FAA Order 8400.12a for RNP 10 Operations</p></td><td valign="top" width="144"><p>Cancelled<br/> (By AMC-20 Amdt 17)</p></td></tr><tr><td valign="top" width="112"><p>AMC 20-13</p></td><td valign="top" width="342"><p>Certification of Mode S Transponder Systems for Enhanced Surveillance</p></td><td valign="top" width="144"><p>Cancelled<br/> (by AMC-20 Amdt 11)</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658004">AMC 20-15</a></b></p></td><td valign="top" width="342"><p>AMC 20-15 Airworthiness Certification Considerations for the Airborne Collision Avoidance System (ACAS II) with optional Hybrid Surveillance</p></td><td valign="top" width="144"><p>AMC-20 Amdt 8</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658008">AMC 20-19</a></b></p></td><td valign="top" width="342"><p>In-Flight Entertainment</p></td><td valign="top" width="144"><p>AMC-20 Amdt 19</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658010">AMC 20-20B</a></b></p></td><td valign="top" width="342"><p>Continuing Structural Integrity Programme</p></td><td valign="top" width="144"><p>AMC-20 Amdt 22</p></td></tr><tr><td valign="top" width="112"><p><b><a href="https://dxweb.easa.europa.eu/dx4/topics/easanewtopic9ba66a9a-a1fd-49e0-9c22-787e5c39621d.">AMC 20-21</a></b></p></td><td valign="top" width="342"><p>Programme to enhance aeroplane Electrical Wiring Interconnection System maintenance</p></td><td valign="top" width="144"><p>AMC-20 Amdt 4</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658041">AMC 20-22</a></b></p></td><td valign="top" width="342"><p>Aeroplane Electrical Wiring Interconnection System Training Programme</p></td><td valign="top" width="144"><p>AMC-20 Amdt 4</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658040">AMC 20-23</a></b></p></td><td valign="top" width="342"><p>Development of Electrical Standard Wiring Practices documentation</p></td><td valign="top" width="144"><p>AMC-20 Amdt 4</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658058">AMC 20-24</a></b></p></td><td valign="top" width="342"><p>Certification Considerations for the Enhanced ATS in NonRadar Areas using ADS-B Surveillance (ADS-B-NRA) Application via 1090 MHZ Extended Squitter</p></td><td valign="top" width="144"><p>AMC-20 Amdt 3</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658066">AMC 20-25A</a></b></p></td><td valign="top" width="342"><p>Airworthiness consideration for Electronic Flight Bags (EFBs)</p></td><td valign="top" width="144"><p>AMC-20 Amdt 16</p></td></tr><tr><td valign="top" width="112"><p>AMC 20-26</p></td><td valign="top" width="342"><p>Airworthiness Approval and Operational Criteria for RNP Authorisation Required (RNP AR) Operations</p></td><td valign="top" width="144"><p>Cancelled<br/> (By AMC-20 Amdt 17)</p></td></tr><tr><td valign="top" width="112"><p>AMC 20-27A</p></td><td valign="top" width="342"><p>Airworthiness Approval and Operational Criteria for RNP APPROACH (RNP APCH) Operations Including APV BAROVNAV Operations</p></td><td valign="top" width="144"><p>Cancelled<br/> (By AMC-20 Amdt 17)</p></td></tr><tr><td valign="top" width="112"><p>AMC 20-28</p></td><td valign="top" width="342"><p>Airworthiness Approval and Operational Criteria related to Area Navigation for Global Navigation Satellite System approach operation to Localiser Performance with Vertical guidance minima using Satellite Based Augmentation System</p></td><td valign="top" width="144"><p>Cancelled<br/> (By AMC-20 Amdt 17)</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658067">AMC 20-29</a></b></p></td><td valign="top" width="342"><p>Composite Aircraft Structure</p></td><td valign="top" width="144"><p>AMC-20 Amdt 6</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658009">AMC 20-42</a></b></p></td><td valign="top" width="342"><p>Airworthiness information security risk assessment</p></td><td valign="top" width="144"><p>AMC-20 Amdt 18</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701657978">AMC 20-115D</a></b></p></td><td valign="top" width="342"><p>Software considerations for certification of airborne systems and equipment</p></td><td valign="top" width="144"><p>AMC-20 Amdt 14</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658079">AMC 20-128A</a></b></p></td><td valign="top" width="342"><p>Design Considerations for Minimizing Hazards Caused by Uncontained Turbine Engine and Auxiliary Power Unit Rotor Failure</p></td><td valign="top" width="144"><p>AMC-20 Initial issue</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658081">AMC 20-136</a></b></p></td><td valign="top" width="342"><p>Aircraft electrical and electronic system lightning protection</p></td><td valign="top" width="144"><p>AMC-20 Amdt 13</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701657977">AMC 20-152A</a></b></p></td><td valign="top" width="342"><p>Airborne Electronic Hardware</p></td><td valign="top" width="144"><p>AMC-20 Amdt 19</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658084">AMC 20-158</a></b></p></td><td valign="top" width="342"><p>Aircraft electrical and electronic system high-intensity radiated fields (HIRF) protection</p></td><td valign="top" width="144"><p>AMC-20 Amdt 13</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658087">AMC 20-170</a></b></p></td><td valign="top" width="342"><p>IMA</p></td><td valign="top" width="144"><p>AMC-20 Amdt 15</p></td></tr><tr><td valign="top" width="112"><p><b><a href="#_DxCrossRefBm1701658088">AMC 20-189</a></b></p></td><td valign="top" width="342"><p>The Management of Open Problem Reports</p></td><td valign="top" width="144"><p>AMC-20 Amdt 19</p></td></tr></table> [Amdt 20/20] [Amdt 20/22] --- [[1]](#_ftnref1) The published date represents the date when the consolidated version of the document was generated. [[2]](#_ftnref2) Euro-Lex, Important Legal Notice: <http://eur-lex.europa.eu/content/legal-notice/legal-notice.html>. [[3]](#_ftnref3) This is the main applicability date defined in the ED Decision. However, the ED Decision allowed that this AMC was not applied to applications received until 30 June 2014, if so requested by the applicant and providing that in such a case the applicant could demonstrate that the process of development of the relevant part or appliance started before the entry into force of the ED Decision (1 January 2014), in accordance with the specifications applicable at that time. [[4]](#_ftnref4) Extremely improbable is defined in CS 25.1309 and AMC to CS 25.1309. [[5]](#_ftnref5) See EASA Airworthiness Directive Policy reference C.Y001-01 (28.07.08). [[6]](#_ftnref6) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[7]](#_ftnref7) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[8]](#_ftnref8) Council Regulation (EEC) No 3922/91 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation. Regulation as last amended by Regulation (EC) No 1899/2006 of the European Parliament and of the Council of 12 December 2006 (OJ L 377, 27.12.2006, p. 1). [[9]](#_ftnref9) The cracking identified in the FAA Airworthiness Directive (AD) 2002-07-09 is an example of the type of cracking that MSD inspections are effective in detecting. These cracks grow from the fastener holes in the lower row of the lower skin panel in such a way that the cracking is readily detectable using NDI methods. The cracking identified in the FAA AD 2002-07-08 is an example of places where MSD inspections are not effective. These cracks grow in the outer surface and between the fastener holes in the lower row of the lower skin panel in such a way that the cracking is not readily detectable using NDI methods. Modification is the only option to address this type of cracking. [[10]](#_ftnref10)<https://publications.airlines.org/CommerceProductDetail.aspx?Product=197> [[11]](#_ftnref11) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[12]](#_ftnref12) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[13]](#_ftnref13) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[14]](#_ftnref14) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[15]](#_ftnref15) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[16]](#_ftnref16) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p. 1). [[17]](#_ftnref17) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p. 3). [[18]](#_ftnref18) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[19]](#_ftnref19) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[20]](#_ftnref20) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[21]](#_ftnref21) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[22]](#_ftnref22) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[23]](#_ftnref23) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[24]](#_ftnref24) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[25]](#_ftnref25) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[26]](#_ftnref26) ED-126: “Safety, Performance and Interoperability Requirements Document for ADS-B-NRA” Application [[27]](#_ftnref27) ED-78A: Guidelines for approval of the provision and use of Air Traffic Services supported by Data communications [[28]](#_ftnref28) Other, requirements compliant, ADS-B transmit systems (e.g. VDL Mode 4) are expected to be covered through separate regulatory material, as appropriate. [[29]](#_ftnref29) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[30]](#_ftnref30) This is a consequence of the definition of the quality indicator encoding describing an interval of values between a lower and an upper bound (refer also to Appendix 4.2). For instance, a NUC=5 encoding expresses an upper bound of position accuracy quality indication of 0.3NM whilst a NUC=7 encoding expresses an upper bound of 0.05NM. Therefore, in case of e.g. the actual GNSS position source performance, a NUC=5 encoding provides sufficient margin to also correctly express the effects of on-board uncompensated latency whilst this is not the case for a NUC=7 encoding any more. [[31]](#_ftnref31) I.e. GNSS conformant HPL/HIL information. [[32]](#_ftnref32) For GNSS based systems, this includes satellite constellation aspects. [[33]](#_ftnref33) For GNSS based position sources, the failure occurs outside the aircraft system and is therefore expressed as per ATSU-hour. Proof of compliance of alternative solely aircraft based sources should take this into account and might have to express the requirement as 10-5 per flight hour (i.e. for the en-route environment). [[34]](#_ftnref34) As realised through receiver autonomous integrity monitoring (RAIM), including its characteristics of increasingly less likely to fail for position errors beyond the horizontal protection limit. Within ED-126, the position source failure is modelled as a bias error that equals the integrity containment radius. [[35]](#_ftnref35) E.g. HPL/HIL based upon known RAIM protection threshold. [[36]](#_ftnref36) ETSO C-145/C146 provides additional capabilities compared with ETSO C129A such as: processing of GPS without Selective Availability, processing of SBAS signals when available and Fault Detection Exclusion as a basic function. Therefore ETSO C145/146 usually provides higher quality integrity values than ETSO C-129A equipment. [[37]](#_ftnref37) For instance, this need can be satisfied by means of dual independent altitude corrected sensors together with an altitude data comparator (which may be incorporated and enabled in the ADS-B transmit system). [[38]](#_ftnref38) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[39]](#_ftnref39) Uncompensated delay measured from to the time of validity of position measurement until ADS-B transmission (i.e. at RF level). [[40]](#_ftnref40) As defined in section 6. [[41]](#_ftnref41) For GNSS based functions, expressed as an assumption of GNSS performance. [[42]](#_ftnref42) The notion of version “0” and “1” differentiates between DO-260/ED-102 and DO-260A transponders. [[43]](#_ftnref43) If provided by flight deck controls. [[44]](#_ftnref44) If provided by flight deck controls. [[45]](#_ftnref45) For special conditions under which the non-transmission of selected discrete emergency codes is allowed, refer to Section 8.8.2. [[46]](#_ftnref46) Only for D0-260A based ADS-B transmit systems. [[47]](#_ftnref47) To address the assumptions about external factors like organisations, processes, etc., see reference in ED-202A. [[48]](#_ftnref48) Commission Regulation (EU) No 748/2012 of 3 August 2012 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 224, 21.8.2012, p. 1) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1574094487050&uri=CELEX:32012R0748>). [[49]](#_ftnref49) Regulation (EU) No 376/2014 of the European Parliament and of the Council of 3 April 2014 on the reporting, analysis and follow-up of occurrences in civil aviation, amending Regulation (EU) No 996/2010 of the European Parliament and of the Council and repealing Directive 2003/42/EC of the European Parliament and of the Council and Commission Regulations (EC) No 1321/2007 and (EC) No 1330/2007 (OJ L 122, 24.4.2014, p. 18) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32014R0376>). [[50]](#_ftnref50) Starting from AMC 20-115D. --- [[1]](#_ftnref1) The published date represents the date when the consolidated version of the document was generated. [[2]](#_ftnref2) Euro-Lex, Important Legal Notice: <http://eur-lex.europa.eu/content/legal-notice/legal-notice.html>. [[3]](#_ftnref3) This is the main applicability date defined in the ED Decision. However, the ED Decision allowed that this AMC was not applied to applications received until 30 June 2014, if so requested by the applicant and providing that in such a case the applicant could demonstrate that the process of development of the relevant part or appliance started before the entry into force of the ED Decision (1 January 2014), in accordance with the specifications applicable at that time. [[4]](#_ftnref4) Extremely improbable is defined in CS 25.1309 and AMC to CS 25.1309. [[5]](#_ftnref5) See EASA Airworthiness Directive Policy reference C.Y001-01 (28.07.08). [[6]](#_ftnref6) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[7]](#_ftnref7) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[8]](#_ftnref8) Council Regulation (EEC) No 3922/91 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation. Regulation as last amended by Regulation (EC) No 1899/2006 of the European Parliament and of the Council of 12 December 2006 (OJ L 377, 27.12.2006, p. 1). [[9]](#_ftnref9) The cracking identified in the FAA Airworthiness Directive (AD) 2002-07-09 is an example of the type of cracking that MSD inspections are effective in detecting. These cracks grow from the fastener holes in the lower row of the lower skin panel in such a way that the cracking is readily detectable using NDI methods. The cracking identified in the FAA AD 2002-07-08 is an example of places where MSD inspections are not effective. These cracks grow in the outer surface and between the fastener holes in the lower row of the lower skin panel in such a way that the cracking is not readily detectable using NDI methods. Modification is the only option to address this type of cracking. [[10]](#_ftnref10)<https://publications.airlines.org/CommerceProductDetail.aspx?Product=197> [[11]](#_ftnref11) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[12]](#_ftnref12) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[13]](#_ftnref13) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[14]](#_ftnref14) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[15]](#_ftnref15) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[16]](#_ftnref16) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p. 1). [[17]](#_ftnref17) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p. 3). [[18]](#_ftnref18) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[19]](#_ftnref19) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[20]](#_ftnref20) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[21]](#_ftnref21) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[22]](#_ftnref22) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[23]](#_ftnref23) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[24]](#_ftnref24) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[25]](#_ftnref25) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[26]](#_ftnref26) ED-126: “Safety, Performance and Interoperability Requirements Document for ADS-B-NRA” Application [[27]](#_ftnref27) ED-78A: Guidelines for approval of the provision and use of Air Traffic Services supported by Data communications [[28]](#_ftnref28) Other, requirements compliant, ADS-B transmit systems (e.g. VDL Mode 4) are expected to be covered through separate regulatory material, as appropriate. [[29]](#_ftnref29) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[30]](#_ftnref30) This is a consequence of the definition of the quality indicator encoding describing an interval of values between a lower and an upper bound (refer also to Appendix 4.2). For instance, a NUC=5 encoding expresses an upper bound of position accuracy quality indication of 0.3NM whilst a NUC=7 encoding expresses an upper bound of 0.05NM. Therefore, in case of e.g. the actual GNSS position source performance, a NUC=5 encoding provides sufficient margin to also correctly express the effects of on-board uncompensated latency whilst this is not the case for a NUC=7 encoding any more. [[31]](#_ftnref31) I.e. GNSS conformant HPL/HIL information. [[32]](#_ftnref32) For GNSS based systems, this includes satellite constellation aspects. [[33]](#_ftnref33) For GNSS based position sources, the failure occurs outside the aircraft system and is therefore expressed as per ATSU-hour. Proof of compliance of alternative solely aircraft based sources should take this into account and might have to express the requirement as 10-5 per flight hour (i.e. for the en-route environment). [[34]](#_ftnref34) As realised through receiver autonomous integrity monitoring (RAIM), including its characteristics of increasingly less likely to fail for position errors beyond the horizontal protection limit. Within ED-126, the position source failure is modelled as a bias error that equals the integrity containment radius. [[35]](#_ftnref35) E.g. HPL/HIL based upon known RAIM protection threshold. [[36]](#_ftnref36) ETSO C-145/C146 provides additional capabilities compared with ETSO C129A such as: processing of GPS without Selective Availability, processing of SBAS signals when available and Fault Detection Exclusion as a basic function. Therefore ETSO C145/146 usually provides higher quality integrity values than ETSO C-129A equipment. [[37]](#_ftnref37) For instance, this need can be satisfied by means of dual independent altitude corrected sensors together with an altitude data comparator (which may be incorporated and enabled in the ADS-B transmit system). [[38]](#_ftnref38) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[39]](#_ftnref39) Uncompensated delay measured from to the time of validity of position measurement until ADS-B transmission (i.e. at RF level). [[40]](#_ftnref40) As defined in section 6. [[41]](#_ftnref41) For GNSS based functions, expressed as an assumption of GNSS performance. [[42]](#_ftnref42) The notion of version “0” and “1” differentiates between DO-260/ED-102 and DO-260A transponders. [[43]](#_ftnref43) If provided by flight deck controls. [[44]](#_ftnref44) If provided by flight deck controls. [[45]](#_ftnref45) For special conditions under which the non-transmission of selected discrete emergency codes is allowed, refer to Section 8.8.2. [[46]](#_ftnref46) Only for D0-260A based ADS-B transmit systems. [[47]](#_ftnref47) To address the assumptions about external factors like organisations, processes, etc., see reference in ED-202A. [[48]](#_ftnref48) Commission Regulation (EU) No 748/2012 of 3 August 2012 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 224, 21.8.2012, p. 1) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1574094487050&uri=CELEX:32012R0748>). [[49]](#_ftnref49) Regulation (EU) No 376/2014 of the European Parliament and of the Council of 3 April 2014 on the reporting, analysis and follow-up of occurrences in civil aviation, amending Regulation (EU) No 996/2010 of the European Parliament and of the Council and repealing Directive 2003/42/EC of the European Parliament and of the Council and Commission Regulations (EC) No 1321/2007 and (EC) No 1330/2007 (OJ L 122, 24.4.2014, p. 18) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32014R0376>). [[50]](#_ftnref50) Starting from AMC 20-115D.
### SUBPART B — LIST OF AMC-20 ITEMS ED Decision 2021/007/R INDEX 1 <table border="1" cellpadding="0" cellspacing="0"> <tr> <td valign="top" width="112"> <p align="left"><b>EASA AMC-20 reference</b></p> </td> <td valign="top" width="342"> <p align="left"><b>Title</b></p> </td> <td valign="top" width="144"> <p><b>Last amended by</b></p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189217">AMC 20-1A</a></b></p> </td> <td valign="top" width="342"> <p>The Certification of Aircraft Propulsion Systems Equipped with Electronic Controls</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189218">AMC 20-2B</a></b></p> </td> <td valign="top" width="342"> <p>The Certification of Essential APUs Equipped with Electronic Controls</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189219">AMC 20-3B</a></b></p> </td> <td valign="top" width="342"> <p>The Certification of Engines Equipped with Electronic Engine Control Systems</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-4A</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria For the Use of Navigation Systems in European Airspace Designated For Basic RNAV Operations</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-5</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria for the use of the Navstar Global Positioning System (GPS)</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189225">AMC 20-6</a></b> rev 2</p> </td> <td valign="top" width="342"> <p>Extended Range Operation with Two-Engine Aeroplanes ETOPS Certification and Operation</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 7</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189242">AMC 20-8A</a></b></p> </td> <td valign="top" width="342"> <p>Occurrence Reporting</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189243">AMC 20-9</a></b></p> </td> <td valign="top" width="342"> <p>Acceptable Means of Compliance for the Approval of Departure Clearance via Data Communications over ACARS.</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 1</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189246">AMC 20-10</a></b></p> </td> <td valign="top" width="342"> <p>Acceptable Means of Compliance for the Approval of Digital ATIS via Data Link over ACARS.</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 1</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-11</p> </td> <td valign="top" width="342"> <p>Acceptable Means of Compliance for the Approval of use of Initial Services for Air Ground Data Link in Continental Airspace</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (by AMC-20 Amdt 11)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-12</p> </td> <td valign="top" width="342"> <p>Recognition of FAA Order 8400.12a for RNP 10 Operations</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-13</p> </td> <td valign="top" width="342"> <p>Certification of Mode S Transponder Systems for Enhanced Surveillance</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (by AMC-20 Amdt 11)</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189248">AMC 20-15</a></b></p> </td> <td valign="top" width="342"> <p>AMC 20-15 Airworthiness Certification Considerations for the Airborne Collision Avoidance System (ACAS II) with optional Hybrid Surveillance</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 8</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189252">AMC 20-19</a></b></p> </td> <td valign="top" width="342"> <p>In-Flight Entertainment</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189254">AMC 20-20B</a></b></p> </td> <td valign="top" width="342"> <p>Continuing Structural Integrity Programme</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 22</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="https://dxweb.easa.europa.eu/dx4/topics/easanewtopic9ba66a9a-a1fd-49e0-9c22-787e5c39621d.">AMC 20-21</a></b></p> </td> <td valign="top" width="342"> <p>Programme to enhance aeroplane Electrical Wiring Interconnection System maintenance</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 4</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189285">AMC 20-22</a></b></p> </td> <td valign="top" width="342"> <p>Aeroplane Electrical Wiring Interconnection System Training Programme</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 4</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189284">AMC 20-23</a></b></p> </td> <td valign="top" width="342"> <p>Development of Electrical Standard Wiring Practices documentation</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 4</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189302">AMC 20-24</a></b></p> </td> <td valign="top" width="342"> <p>Certification Considerations for the Enhanced ATS in NonRadar Areas using ADS-B Surveillance (ADS-B-NRA) Application via 1090 MHZ Extended Squitter</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 3</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189310">AMC 20-25A</a></b></p> </td> <td valign="top" width="342"> <p>Airworthiness consideration for Electronic Flight Bags (EFBs)</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 16</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-26</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria for RNP Authorisation Required (RNP AR) Operations</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-27A</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria for RNP APPROACH (RNP APCH) Operations Including APV BAROVNAV Operations</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-28</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria related to Area Navigation for Global Navigation Satellite System approach operation to Localiser Performance with Vertical guidance minima using Satellite Based Augmentation System</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189311">AMC 20-29</a></b></p> </td> <td valign="top" width="342"> <p>Composite Aircraft Structure</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 6</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189253">AMC 20-42</a></b></p> </td> <td valign="top" width="342"> <p>Airworthiness information security risk assessment</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 18</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189222">AMC 20-115D</a></b></p> </td> <td valign="top" width="342"> <p>Software considerations for certification of airborne systems and equipment</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 14</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189323">AMC 20-128A</a></b></p> </td> <td valign="top" width="342"> <p>Design Considerations for Minimizing Hazards Caused by Uncontained Turbine Engine and Auxiliary Power Unit Rotor Failure</p> </td> <td valign="top" width="144"> <p>AMC-20 Initial issue</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189325">AMC 20-136A</a></b></p> </td> <td valign="top" width="342"> <p>Aircraft electrical and electronic system lightning protection</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 23</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189221">AMC 20-152A</a></b></p> </td> <td valign="top" width="342"> <p>Airborne Electronic Hardware</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189329">AMC 20-158A</a></b></p> </td> <td valign="top" width="342"> <p>Aircraft electrical and electronic system high-intensity radiated fields (HIRF) protection</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 23</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189335">AMC 20-170</a></b></p> </td> <td valign="top" width="342"> <p>IMA</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 15</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189336">AMC 20-189</a></b></p> </td> <td valign="top" width="342"> <p>The Management of Open Problem Reports</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm1926189340">AMC 20-193</a></b></p> </td> <td valign="top" width="342"> <p>Use of multi-core processors</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 23</p> </td> </tr> </table> [Amdt 20/20] [Amdt 20/22] [Amdt 20/23] --- [[1]](#_ftnref1) The published date represents the date when the consolidated version of the document was generated. [[2]](#_ftnref2) Euro-Lex, Important Legal Notice: <http://eur-lex.europa.eu/content/legal-notice/legal-notice.html>. [[3]](#_ftnref3) This is the main applicability date defined in the ED Decision. However, the ED Decision allowed that this AMC was not applied to applications received until 30 June 2014, if so requested by the applicant and providing that in such a case the applicant could demonstrate that the process of development of the relevant part or appliance started before the entry into force of the ED Decision (1 January 2014), in accordance with the specifications applicable at that time. [[4]](#_ftnref4) Extremely improbable is defined in CS 25.1309 and AMC to CS 25.1309. [[5]](#_ftnref5) See EASA Airworthiness Directive Policy reference C.Y001-01 (28.07.08). [[6]](#_ftnref6) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[7]](#_ftnref7) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[8]](#_ftnref8) Council Regulation (EEC) No 3922/91 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation. Regulation as last amended by Regulation (EC) No 1899/2006 of the European Parliament and of the Council of 12 December 2006 (OJ L 377, 27.12.2006, p. 1). [[9]](#_ftnref9) The cracking identified in the FAA Airworthiness Directive (AD) 2002-07-09 is an example of the type of cracking that MSD inspections are effective in detecting. These cracks grow from the fastener holes in the lower row of the lower skin panel in such a way that the cracking is readily detectable using NDI methods. The cracking identified in the FAA AD 2002-07-08 is an example of places where MSD inspections are not effective. These cracks grow in the outer surface and between the fastener holes in the lower row of the lower skin panel in such a way that the cracking is not readily detectable using NDI methods. Modification is the only option to address this type of cracking. [[10]](#_ftnref10) <https://publications.airlines.org/CommerceProductDetail.aspx?Product=197> [[11]](#_ftnref11) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[12]](#_ftnref12) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[13]](#_ftnref13) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[14]](#_ftnref14) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[15]](#_ftnref15) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[16]](#_ftnref16) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p. 1). [[17]](#_ftnref17) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p. 3). [[18]](#_ftnref18) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[19]](#_ftnref19) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[20]](#_ftnref20) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[21]](#_ftnref21) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[22]](#_ftnref22) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[23]](#_ftnref23) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[24]](#_ftnref24) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[25]](#_ftnref25) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[26]](#_ftnref26) ED-126: “Safety, Performance and Interoperability Requirements Document for ADS-B-NRA” Application [[27]](#_ftnref27) ED-78A: Guidelines for approval of the provision and use of Air Traffic Services supported by Data communications [[28]](#_ftnref28) Other, requirements compliant, ADS-B transmit systems (e.g. VDL Mode 4) are expected to be covered through separate regulatory material, as appropriate. [[29]](#_ftnref29) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[30]](#_ftnref30) This is a consequence of the definition of the quality indicator encoding describing an interval of values between a lower and an upper bound (refer also to Appendix 4.2). For instance, a NUC=5 encoding expresses an upper bound of position accuracy quality indication of 0.3NM whilst a NUC=7 encoding expresses an upper bound of 0.05NM. Therefore, in case of e.g. the actual GNSS position source performance, a NUC=5 encoding provides sufficient margin to also correctly express the effects of on-board uncompensated latency whilst this is not the case for a NUC=7 encoding any more. [[31]](#_ftnref31) I.e. GNSS conformant HPL/HIL information. [[32]](#_ftnref32) For GNSS based systems, this includes satellite constellation aspects. [[33]](#_ftnref33) For GNSS based position sources, the failure occurs outside the aircraft system and is therefore expressed as per ATSU-hour. Proof of compliance of alternative solely aircraft based sources should take this into account and might have to express the requirement as 10-5 per flight hour (i.e. for the en-route environment). [[34]](#_ftnref34) As realised through receiver autonomous integrity monitoring (RAIM), including its characteristics of increasingly less likely to fail for position errors beyond the horizontal protection limit. Within ED-126, the position source failure is modelled as a bias error that equals the integrity containment radius. [[35]](#_ftnref35) E.g. HPL/HIL based upon known RAIM protection threshold. [[36]](#_ftnref36) ETSO C-145/C146 provides additional capabilities compared with ETSO C129A such as: processing of GPS without Selective Availability, processing of SBAS signals when available and Fault Detection Exclusion as a basic function. Therefore ETSO C145/146 usually provides higher quality integrity values than ETSO C-129A equipment. [[37]](#_ftnref37) For instance, this need can be satisfied by means of dual independent altitude corrected sensors together with an altitude data comparator (which may be incorporated and enabled in the ADS-B transmit system). [[38]](#_ftnref38) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[39]](#_ftnref39) Uncompensated delay measured from to the time of validity of position measurement until ADS-B transmission (i.e. at RF level). [[40]](#_ftnref40) As defined in section 6. [[41]](#_ftnref41) For GNSS based functions, expressed as an assumption of GNSS performance. [[42]](#_ftnref42) The notion of version “0” and “1” differentiates between DO-260/ED-102 and DO-260A transponders. [[43]](#_ftnref43) If provided by flight deck controls. [[44]](#_ftnref44) If provided by flight deck controls. [[45]](#_ftnref45) For special conditions under which the non-transmission of selected discrete emergency codes is allowed, refer to Section 8.8.2. [[46]](#_ftnref46) Only for D0-260A based ADS-B transmit systems. [[47]](#_ftnref47) To address the assumptions about external factors like organisations, processes, etc., see reference in ED-202A. [[48]](#_ftnref48) Commission Regulation (EU) No 748/2012 of 3 August 2012 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 224, 21.8.2012, p. 1) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1574094487050&uri=CELEX:32012R0748>). [[49]](#_ftnref49) Regulation (EU) No 376/2014 of the European Parliament and of the Council of 3 April 2014 on the reporting, analysis and follow-up of occurrences in civil aviation, amending Regulation (EU) No 996/2010 of the European Parliament and of the Council and repealing Directive 2003/42/EC of the European Parliament and of the Council and Commission Regulations (EC) No 1321/2007 and (EC) No 1330/2007 (OJ L 122, 24.4.2014, p. 18) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32014R0376>). [[50]](#_ftnref50) Starting from AMC 20-115D. --- [[1]](#_ftnref1) The published date represents the date when the consolidated version of the document was generated. [[2]](#_ftnref2) Euro-Lex, Important Legal Notice: <http://eur-lex.europa.eu/content/legal-notice/legal-notice.html>. [[3]](#_ftnref3) This is the main applicability date defined in the ED Decision. However, the ED Decision allowed that this AMC was not applied to applications received until 30 June 2014, if so requested by the applicant and providing that in such a case the applicant could demonstrate that the process of development of the relevant part or appliance started before the entry into force of the ED Decision (1 January 2014), in accordance with the specifications applicable at that time. [[4]](#_ftnref4) Extremely improbable is defined in CS 25.1309 and AMC to CS 25.1309. [[5]](#_ftnref5) See EASA Airworthiness Directive Policy reference C.Y001-01 (28.07.08). [[6]](#_ftnref6) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[7]](#_ftnref7) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[8]](#_ftnref8) Council Regulation (EEC) No 3922/91 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation. Regulation as last amended by Regulation (EC) No 1899/2006 of the European Parliament and of the Council of 12 December 2006 (OJ L 377, 27.12.2006, p. 1). [[9]](#_ftnref9) The cracking identified in the FAA Airworthiness Directive (AD) 2002-07-09 is an example of the type of cracking that MSD inspections are effective in detecting. These cracks grow from the fastener holes in the lower row of the lower skin panel in such a way that the cracking is readily detectable using NDI methods. The cracking identified in the FAA AD 2002-07-08 is an example of places where MSD inspections are not effective. These cracks grow in the outer surface and between the fastener holes in the lower row of the lower skin panel in such a way that the cracking is not readily detectable using NDI methods. Modification is the only option to address this type of cracking. [[10]](#_ftnref10) <https://publications.airlines.org/CommerceProductDetail.aspx?Product=197> [[11]](#_ftnref11) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[12]](#_ftnref12) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[13]](#_ftnref13) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[14]](#_ftnref14) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[15]](#_ftnref15) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[16]](#_ftnref16) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p. 1). [[17]](#_ftnref17) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p. 3). [[18]](#_ftnref18) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[19]](#_ftnref19) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[20]](#_ftnref20) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[21]](#_ftnref21) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[22]](#_ftnref22) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[23]](#_ftnref23) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[24]](#_ftnref24) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[25]](#_ftnref25) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[26]](#_ftnref26) ED-126: “Safety, Performance and Interoperability Requirements Document for ADS-B-NRA” Application [[27]](#_ftnref27) ED-78A: Guidelines for approval of the provision and use of Air Traffic Services supported by Data communications [[28]](#_ftnref28) Other, requirements compliant, ADS-B transmit systems (e.g. VDL Mode 4) are expected to be covered through separate regulatory material, as appropriate. [[29]](#_ftnref29) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[30]](#_ftnref30) This is a consequence of the definition of the quality indicator encoding describing an interval of values between a lower and an upper bound (refer also to Appendix 4.2). For instance, a NUC=5 encoding expresses an upper bound of position accuracy quality indication of 0.3NM whilst a NUC=7 encoding expresses an upper bound of 0.05NM. Therefore, in case of e.g. the actual GNSS position source performance, a NUC=5 encoding provides sufficient margin to also correctly express the effects of on-board uncompensated latency whilst this is not the case for a NUC=7 encoding any more. [[31]](#_ftnref31) I.e. GNSS conformant HPL/HIL information. [[32]](#_ftnref32) For GNSS based systems, this includes satellite constellation aspects. [[33]](#_ftnref33) For GNSS based position sources, the failure occurs outside the aircraft system and is therefore expressed as per ATSU-hour. Proof of compliance of alternative solely aircraft based sources should take this into account and might have to express the requirement as 10-5 per flight hour (i.e. for the en-route environment). [[34]](#_ftnref34) As realised through receiver autonomous integrity monitoring (RAIM), including its characteristics of increasingly less likely to fail for position errors beyond the horizontal protection limit. Within ED-126, the position source failure is modelled as a bias error that equals the integrity containment radius. [[35]](#_ftnref35) E.g. HPL/HIL based upon known RAIM protection threshold. [[36]](#_ftnref36) ETSO C-145/C146 provides additional capabilities compared with ETSO C129A such as: processing of GPS without Selective Availability, processing of SBAS signals when available and Fault Detection Exclusion as a basic function. Therefore ETSO C145/146 usually provides higher quality integrity values than ETSO C-129A equipment. [[37]](#_ftnref37) For instance, this need can be satisfied by means of dual independent altitude corrected sensors together with an altitude data comparator (which may be incorporated and enabled in the ADS-B transmit system). [[38]](#_ftnref38) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[39]](#_ftnref39) Uncompensated delay measured from to the time of validity of position measurement until ADS-B transmission (i.e. at RF level). [[40]](#_ftnref40) As defined in section 6. [[41]](#_ftnref41) For GNSS based functions, expressed as an assumption of GNSS performance. [[42]](#_ftnref42) The notion of version “0” and “1” differentiates between DO-260/ED-102 and DO-260A transponders. [[43]](#_ftnref43) If provided by flight deck controls. [[44]](#_ftnref44) If provided by flight deck controls. [[45]](#_ftnref45) For special conditions under which the non-transmission of selected discrete emergency codes is allowed, refer to Section 8.8.2. [[46]](#_ftnref46) Only for D0-260A based ADS-B transmit systems. [[47]](#_ftnref47) To address the assumptions about external factors like organisations, processes, etc., see reference in ED-202A. [[48]](#_ftnref48) Commission Regulation (EU) No 748/2012 of 3 August 2012 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 224, 21.8.2012, p. 1) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1574094487050&uri=CELEX:32012R0748>). [[49]](#_ftnref49) Regulation (EU) No 376/2014 of the European Parliament and of the Council of 3 April 2014 on the reporting, analysis and follow-up of occurrences in civil aviation, amending Regulation (EU) No 996/2010 of the European Parliament and of the Council and repealing Directive 2003/42/EC of the European Parliament and of the Council and Commission Regulations (EC) No 1321/2007 and (EC) No 1330/2007 (OJ L 122, 24.4.2014, p. 18) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32014R0376>). [[50]](#_ftnref50) Starting from AMC 20-115D.
### SUBPART B — LIST OF AMC-20 ITEMS ED Decision 2020/010/R INDEX 1 <table border="1" cellpadding="0" cellspacing="0"> <tr> <td valign="top" width="112"> <p align="left"><b>EASA AMC-20 reference</b></p> </td> <td valign="top" width="342"> <p align="left"><b>Title</b></p> </td> <td valign="top" width="144"> <p><b>Last amended by</b></p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436781">AMC 20-1A</a></b></p> </td> <td valign="top" width="342"> <p>The Certification of Aircraft Propulsion Systems Equipped with Electronic Controls</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436782">AMC 20-2B</a></b></p> </td> <td valign="top" width="342"> <p>The Certification of Essential APUs Equipped with Electronic Controls</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436786">AMC 20-3B</a></b></p> </td> <td valign="top" width="342"> <p>The Certification of Engines Equipped with Electronic Engine Control Systems</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-4A</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria For the Use of Navigation Systems in European Airspace Designated For Basic RNAV Operations</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-5</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria for the use of the Navstar Global Positioning System (GPS)</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436787">AMC 20-6</a></b> rev 2</p> </td> <td valign="top" width="342"> <p>Extended Range Operation with Two-Engine Aeroplanes ETOPS Certification and Operation</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 7</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436804">AMC 20-8A</a></b></p> </td> <td valign="top" width="342"> <p>Occurrence Reporting</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436805">AMC 20-9</a></b></p> </td> <td valign="top" width="342"> <p>Acceptable Means of Compliance for the Approval of Departure Clearance via Data Communications over ACARS.</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 1</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436808">AMC 20-10</a></b></p> </td> <td valign="top" width="342"> <p>Acceptable Means of Compliance for the Approval of Digital ATIS via Data Link over ACARS.</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 1</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-11</p> </td> <td valign="top" width="342"> <p>Acceptable Means of Compliance for the Approval of use of Initial Services for Air Ground Data Link in Continental Airspace</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (by AMC-20 Amdt 11)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-12</p> </td> <td valign="top" width="342"> <p>Recognition of FAA Order 8400.12a for RNP 10 Operations</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-13</p> </td> <td valign="top" width="342"> <p>Certification of Mode S Transponder Systems for Enhanced Surveillance</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (by AMC-20 Amdt 11)</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436810">AMC 20-15</a></b></p> </td> <td valign="top" width="342"> <p>AMC 20-15 Airworthiness Certification Considerations for the Airborne Collision Avoidance System (ACAS II) with optional Hybrid Surveillance</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 8</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436814">AMC 20-19</a></b></p> </td> <td valign="top" width="342"> <p>In-Flight Entertainment</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436816">AMC 20-20</a></b></p> </td> <td valign="top" width="342"> <p>Continuing Structural Integrity Programme</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 3</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="https://dxweb.easa.europa.eu/dx4/topics/easanewtopic9ba66a9a-a1fd-49e0-9c22-787e5c39621d.">AMC 20-21</a></b></p> </td> <td valign="top" width="342"> <p>Programme to enhance aeroplane Electrical Wiring Interconnection System maintenance</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 4</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436847">AMC 20-22</a></b></p> </td> <td valign="top" width="342"> <p>Aeroplane Electrical Wiring Interconnection System Training Programme</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 4</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436846">AMC 20-23</a></b></p> </td> <td valign="top" width="342"> <p>Development of Electrical Standard Wiring Practices documentation</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 4</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436864">AMC 20-24</a></b></p> </td> <td valign="top" width="342"> <p>Certification Considerations for the Enhanced ATS in NonRadar Areas using ADS-B Surveillance (ADS-B-NRA) Application via 1090 MHZ Extended Squitter</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 3</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436872">AMC 20-25A</a></b></p> </td> <td valign="top" width="342"> <p>Airworthiness consideration for Electronic Flight Bags (EFBs)</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 16</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-26</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria for RNP Authorisation Required (RNP AR) Operations</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-27A</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria for RNP APPROACH (RNP APCH) Operations Including APV BAROVNAV Operations</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p>AMC 20-28</p> </td> <td valign="top" width="342"> <p>Airworthiness Approval and Operational Criteria related to Area Navigation for Global Navigation Satellite System approach operation to Localiser Performance with Vertical guidance minima using Satellite Based Augmentation System</p> </td> <td valign="top" width="144"> <p>Cancelled<br/> (By AMC-20 Amdt 17)</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436873">AMC 20-29</a></b></p> </td> <td valign="top" width="342"> <p>Composite Aircraft Structure</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 6</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436815">AMC 20-42</a></b></p> </td> <td valign="top" width="342"> <p>Airworthiness information security risk assessment</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 18</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436784">AMC 20-115D</a></b></p> </td> <td valign="top" width="342"> <p>Software considerations for certification of airborne systems and equipment</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 14</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436885">AMC 20-128A</a></b></p> </td> <td valign="top" width="342"> <p>Design Considerations for Minimizing Hazards Caused by Uncontained Turbine Engine and Auxiliary Power Unit Rotor Failure</p> </td> <td valign="top" width="144"> <p>AMC-20 Initial issue</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436887">AMC 20-136</a></b></p> </td> <td valign="top" width="342"> <p>Aircraft electrical and electronic system lightning protection</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 13</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436783">AMC 20-152A</a></b></p> </td> <td valign="top" width="342"> <p>Airborne Electronic Hardware</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436890">AMC 20-158</a></b></p> </td> <td valign="top" width="342"> <p>Aircraft electrical and electronic system high-intensity radiated fields (HIRF) protection</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 13</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436893">AMC 20-170</a></b></p> </td> <td valign="top" width="342"> <p>IMA</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 15</p> </td> </tr> <tr> <td valign="top" width="112"> <p><b><a href="#_DxCrossRefBm421436894">AMC 20-189</a></b></p> </td> <td valign="top" width="342"> <p>The Management of Open Problem Reports</p> </td> <td valign="top" width="144"> <p>AMC-20 Amdt 19</p> </td> </tr> </table> [Amdt 20/20] --- [[1]](#_ftnref1) The published date represents the date when the consolidated version of the document was generated. [[2]](#_ftnref2) Euro-Lex, Important Legal Notice: <http://eur-lex.europa.eu/content/legal-notice/legal-notice.html>. [[3]](#_ftnref3) This is the main applicability date defined in the ED Decision. However, the ED Decision allowed that this AMC was not applied to applications received until 30 June 2014, if so requested by the applicant and providing that in such a case the applicant could demonstrate that the process of development of the relevant part or appliance started before the entry into force of the ED Decision (1 January 2014), in accordance with the specifications applicable at that time. [[4]](#_ftnref4) Extremely improbable is defined in CS 25.1309 and AMC to CS 25.1309. [[5]](#_ftnref5) See EASA Airworthiness Directive Policy reference C.Y001-01 (28.07.08). [[6]](#_ftnref6) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[7]](#_ftnref7) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[8]](#_ftnref8) Council Regulation (EEC) No 3922/91 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation. Regulation as last amended by Regulation (EC) No 1899/2006 of the European Parliament and of the Council of 12 December 2006 (OJ L 377, 27.12.2006, p. 1). [[9]](#_ftnref9) The cracking identified in the FAA Airworthiness Directive (AD) 2002-07-09 is an example of the type of cracking that MSD inspections are effective in detecting. These cracks grow from the fastener holes in the lower row of the lower skin panel in such a way that the cracking is readily detectable using NDI methods. The cracking identified in the FAA AD 2002-07-08 is an example of places where MSD inspections are not effective. These cracks grow in the outer surface and between the fastener holes in the lower row of the lower skin panel in such a way that the cracking is not readily detectable using NDI methods. Modification is the only option to address this type of cracking. [[10]](#_ftnref10) <https://publications.airlines.org/CommerceProductDetail.aspx?Product=197> [[11]](#_ftnref11) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[12]](#_ftnref12) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[13]](#_ftnref13) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[14]](#_ftnref14) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[15]](#_ftnref15) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[16]](#_ftnref16) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p. 1). [[17]](#_ftnref17) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p. 3). [[18]](#_ftnref18) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[19]](#_ftnref19) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[20]](#_ftnref20) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[21]](#_ftnref21) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[22]](#_ftnref22) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[23]](#_ftnref23) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[24]](#_ftnref24) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[25]](#_ftnref25) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[26]](#_ftnref26) ED-126: “Safety, Performance and Interoperability Requirements Document for ADS-B-NRA” Application [[27]](#_ftnref27) ED-78A: Guidelines for approval of the provision and use of Air Traffic Services supported by Data communications [[28]](#_ftnref28) Other, requirements compliant, ADS-B transmit systems (e.g. VDL Mode 4) are expected to be covered through separate regulatory material, as appropriate. [[29]](#_ftnref29) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[30]](#_ftnref30) This is a consequence of the definition of the quality indicator encoding describing an interval of values between a lower and an upper bound (refer also to Appendix 4.2). For instance, a NUC=5 encoding expresses an upper bound of position accuracy quality indication of 0.3NM whilst a NUC=7 encoding expresses an upper bound of 0.05NM. Therefore, in case of e.g. the actual GNSS position source performance, a NUC=5 encoding provides sufficient margin to also correctly express the effects of on-board uncompensated latency whilst this is not the case for a NUC=7 encoding any more. [[31]](#_ftnref31) I.e. GNSS conformant HPL/HIL information. [[32]](#_ftnref32) For GNSS based systems, this includes satellite constellation aspects. [[33]](#_ftnref33) For GNSS based position sources, the failure occurs outside the aircraft system and is therefore expressed as per ATSU-hour. Proof of compliance of alternative solely aircraft based sources should take this into account and might have to express the requirement as 10-5 per flight hour (i.e. for the en-route environment). [[34]](#_ftnref34) As realised through receiver autonomous integrity monitoring (RAIM), including its characteristics of increasingly less likely to fail for position errors beyond the horizontal protection limit. Within ED-126, the position source failure is modelled as a bias error that equals the integrity containment radius. [[35]](#_ftnref35) E.g. HPL/HIL based upon known RAIM protection threshold. [[36]](#_ftnref36) ETSO C-145/C146 provides additional capabilities compared with ETSO C129A such as: processing of GPS without Selective Availability, processing of SBAS signals when available and Fault Detection Exclusion as a basic function. Therefore ETSO C145/146 usually provides higher quality integrity values than ETSO C-129A equipment. [[37]](#_ftnref37) For instance, this need can be satisfied by means of dual independent altitude corrected sensors together with an altitude data comparator (which may be incorporated and enabled in the ADS-B transmit system). [[38]](#_ftnref38) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[39]](#_ftnref39) Uncompensated delay measured from to the time of validity of position measurement until ADS-B transmission (i.e. at RF level). [[40]](#_ftnref40) As defined in section 6. [[41]](#_ftnref41) For GNSS based functions, expressed as an assumption of GNSS performance. [[42]](#_ftnref42) The notion of version “0” and “1” differentiates between DO-260/ED-102 and DO-260A transponders. [[43]](#_ftnref43) If provided by flight deck controls. [[44]](#_ftnref44) If provided by flight deck controls. [[45]](#_ftnref45) For special conditions under which the non-transmission of selected discrete emergency codes is allowed, refer to Section 8.8.2. [[46]](#_ftnref46) Only for D0-260A based ADS-B transmit systems. [[47]](#_ftnref47) To address the assumptions about external factors like organisations, processes, etc., see reference in ED-202A. [[48]](#_ftnref48) Commission Regulation (EU) No 748/2012 of 3 August 2012 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 224, 21.8.2012, p. 1) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1574094487050&uri=CELEX:32012R0748>). [[49]](#_ftnref49) Regulation (EU) No 376/2014 of the European Parliament and of the Council of 3 April 2014 on the reporting, analysis and follow-up of occurrences in civil aviation, amending Regulation (EU) No 996/2010 of the European Parliament and of the Council and repealing Directive 2003/42/EC of the European Parliament and of the Council and Commission Regulations (EC) No 1321/2007 and (EC) No 1330/2007 (OJ L 122, 24.4.2014, p. 18) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32014R0376>). [[50]](#_ftnref50) Starting from AMC 20-115D. --- [[1]](#_ftnref1) The published date represents the date when the consolidated version of the document was generated. [[2]](#_ftnref2) Euro-Lex, Important Legal Notice: <http://eur-lex.europa.eu/content/legal-notice/legal-notice.html>. [[3]](#_ftnref3) This is the main applicability date defined in the ED Decision. However, the ED Decision allowed that this AMC was not applied to applications received until 30 June 2014, if so requested by the applicant and providing that in such a case the applicant could demonstrate that the process of development of the relevant part or appliance started before the entry into force of the ED Decision (1 January 2014), in accordance with the specifications applicable at that time. [[4]](#_ftnref4) Extremely improbable is defined in CS 25.1309 and AMC to CS 25.1309. [[5]](#_ftnref5) See EASA Airworthiness Directive Policy reference C.Y001-01 (28.07.08). [[6]](#_ftnref6) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[7]](#_ftnref7) Information on LINK2000+ is available at web site [www.eurocontrol.int/link2000](http://www.eurocontrol.int/link2000) [[8]](#_ftnref8) Council Regulation (EEC) No 3922/91 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation. Regulation as last amended by Regulation (EC) No 1899/2006 of the European Parliament and of the Council of 12 December 2006 (OJ L 377, 27.12.2006, p. 1). [[9]](#_ftnref9) The cracking identified in the FAA Airworthiness Directive (AD) 2002-07-09 is an example of the type of cracking that MSD inspections are effective in detecting. These cracks grow from the fastener holes in the lower row of the lower skin panel in such a way that the cracking is readily detectable using NDI methods. The cracking identified in the FAA AD 2002-07-08 is an example of places where MSD inspections are not effective. These cracks grow in the outer surface and between the fastener holes in the lower row of the lower skin panel in such a way that the cracking is not readily detectable using NDI methods. Modification is the only option to address this type of cracking. [[10]](#_ftnref10) <https://publications.airlines.org/CommerceProductDetail.aspx?Product=197> [[11]](#_ftnref11) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[12]](#_ftnref12) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[13]](#_ftnref13) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[14]](#_ftnref14) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[15]](#_ftnref15) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[16]](#_ftnref16) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p. 1). [[17]](#_ftnref17) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p. 3). [[18]](#_ftnref18) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[19]](#_ftnref19) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[20]](#_ftnref20) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[21]](#_ftnref21) Regulation (EC) No 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p.1). [[22]](#_ftnref22) Commission Regulation (EC) No 1702/2003 of 24 September 2003 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 243, 27.9.2003, p. 6). Regulation as last amended by Regulation (EC) No 287/2008 (OJ L 87, 29.3.2008, p.3). [[23]](#_ftnref23) Commission Regulation (EC) No 2042/2003 of 20 November 2003 on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks (OJ L 315, 28.11.2003, p. 1). Regulation as last amended by Regulation (EC) No 376/2007 of (OJ L 94, 4.4.2007, p. 18). [[24]](#_ftnref24) Executive Director Decision No 2003/2/RM of 14 October 2003 on certification specifications, including airworthiness codes and acceptable means of compliance, for large aeroplanes («CS-25»). Decision as last amended by Executive Director Decision No 2008/006/R of 29 August 2008 (CS-25 Amendment 5). [[25]](#_ftnref25) Council Regulation (EEC) No 3922/91 of 16 December 1991 on the harmonisation of technical requirements and administrative procedures in the field of civil aviation (OJ L 373, 31.12.1991, p. 4). Regulation as last amended by Regulation (EC) No 8/2008 of 11 December 2007 (OJ L 10, 12.1.2008, p. 1). [[26]](#_ftnref26) ED-126: “Safety, Performance and Interoperability Requirements Document for ADS-B-NRA” Application [[27]](#_ftnref27) ED-78A: Guidelines for approval of the provision and use of Air Traffic Services supported by Data communications [[28]](#_ftnref28) Other, requirements compliant, ADS-B transmit systems (e.g. VDL Mode 4) are expected to be covered through separate regulatory material, as appropriate. [[29]](#_ftnref29) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[30]](#_ftnref30) This is a consequence of the definition of the quality indicator encoding describing an interval of values between a lower and an upper bound (refer also to Appendix 4.2). For instance, a NUC=5 encoding expresses an upper bound of position accuracy quality indication of 0.3NM whilst a NUC=7 encoding expresses an upper bound of 0.05NM. Therefore, in case of e.g. the actual GNSS position source performance, a NUC=5 encoding provides sufficient margin to also correctly express the effects of on-board uncompensated latency whilst this is not the case for a NUC=7 encoding any more. [[31]](#_ftnref31) I.e. GNSS conformant HPL/HIL information. [[32]](#_ftnref32) For GNSS based systems, this includes satellite constellation aspects. [[33]](#_ftnref33) For GNSS based position sources, the failure occurs outside the aircraft system and is therefore expressed as per ATSU-hour. Proof of compliance of alternative solely aircraft based sources should take this into account and might have to express the requirement as 10-5 per flight hour (i.e. for the en-route environment). [[34]](#_ftnref34) As realised through receiver autonomous integrity monitoring (RAIM), including its characteristics of increasingly less likely to fail for position errors beyond the horizontal protection limit. Within ED-126, the position source failure is modelled as a bias error that equals the integrity containment radius. [[35]](#_ftnref35) E.g. HPL/HIL based upon known RAIM protection threshold. [[36]](#_ftnref36) ETSO C-145/C146 provides additional capabilities compared with ETSO C129A such as: processing of GPS without Selective Availability, processing of SBAS signals when available and Fault Detection Exclusion as a basic function. Therefore ETSO C145/146 usually provides higher quality integrity values than ETSO C-129A equipment. [[37]](#_ftnref37) For instance, this need can be satisfied by means of dual independent altitude corrected sensors together with an altitude data comparator (which may be incorporated and enabled in the ADS-B transmit system). [[38]](#_ftnref38) Refer to sections 8.3.3, 8.3.5 and 8.8.2. [[39]](#_ftnref39) Uncompensated delay measured from to the time of validity of position measurement until ADS-B transmission (i.e. at RF level). [[40]](#_ftnref40) As defined in section 6. [[41]](#_ftnref41) For GNSS based functions, expressed as an assumption of GNSS performance. [[42]](#_ftnref42) The notion of version “0” and “1” differentiates between DO-260/ED-102 and DO-260A transponders. [[43]](#_ftnref43) If provided by flight deck controls. [[44]](#_ftnref44) If provided by flight deck controls. [[45]](#_ftnref45) For special conditions under which the non-transmission of selected discrete emergency codes is allowed, refer to Section 8.8.2. [[46]](#_ftnref46) Only for D0-260A based ADS-B transmit systems. [[47]](#_ftnref47) To address the assumptions about external factors like organisations, processes, etc., see reference in ED-202A. [[48]](#_ftnref48) Commission Regulation (EU) No 748/2012 of 3 August 2012 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (OJ L 224, 21.8.2012, p. 1) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1574094487050&uri=CELEX:32012R0748>). [[49]](#_ftnref49) Regulation (EU) No 376/2014 of the European Parliament and of the Council of 3 April 2014 on the reporting, analysis and follow-up of occurrences in civil aviation, amending Regulation (EU) No 996/2010 of the European Parliament and of the Council and repealing Directive 2003/42/EC of the European Parliament and of the Council and Commission Regulations (EC) No 1321/2007 and (EC) No 1330/2007 (OJ L 122, 24.4.2014, p. 18) (<https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32014R0376>). [[50]](#_ftnref50) Starting from AMC 20-115D.