ETSO-2C517

• ED Decision 2020/011/R found in: CS-ETSO Amdt 17 - European Technical Standard Orders (Oct 2026)

#### ETSO-2C517 *ED Decision 2020/011/R* ##### Automatic Deployable Flight Recorder (ADFR) Systems for Large Aeroplanes **1 Applicability** This ETSO provides the requirements which automatic deployable flight recorder (AFDR) systems intended for installation in large aeroplanes that are designed and manufactured on or after the date of this ETSO must meet in order to be identified with the applicable ETSO marking. **2 Procedures** 2.1 General The applicable procedures are detailed in CS-ETSO, [Subpart A](#_DxCrossRefBm920220672). 2.2 Specific None. **3 Technical Conditions** 3.1 Basic 3.1.1 Minimum Performance Standard The applicable standards are those provided in EUROCAE ED-112A, MOPS for Crash Protected Airborne Recorder Systems, dated September 2013, Section 3, as amended by Appendix 1 to this ETSO. The ADFR system shall also be approved in accordance with the latest revision of the ETSO that is applicable to the supported function: <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <tr valign="top"> <td bgcolor="#d9d9d9"><p> ETSO-(2)C123()</p> </td> <td bgcolor="#d9d9d9"><p> Cockpit Voice Recorder Systems</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p> ETSO-(2)C124()</p> </td> <td bgcolor="#d9d9d9"><p align="justify"> Flight Data Recorder Systems </p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p> ETSO-(2)C176()</p> </td> <td bgcolor="#d9d9d9"><p> Aircraft Cockpit Image Recorder Systems</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p> ETSO-(2)C177()</p> </td> <td bgcolor="#d9d9d9"><p> Data Link Recorder Equipment</p> </td> </tr> </table> The emergency locator transmitter fitted to the ADFR shall be approved as a minimum in accordance with ETSO-C126c, Type ELT(AD) Class 0 or 1, with capabilities C (Crash resistance), H1 (121.5MHz homing) and be of any generation (capability T.001 or T.018). 3.1.2 Environmental Standard See CS-ETSO, Subpart A, paragraph 2.1, and EUROCAE ED-112A as amended by Appendix 1 to this ETSO. 3.1.3 Software See CS-ETSO, Subpart A, paragraph 2.2. 3.1.4 Airborne Electronic Hardware See CS-ETSO, Subpart A, paragraph 2.3. 3.2 Specific 3.2.1 Failure Condition Classification See CS-ETSO, Subpart A, paragraph 2.4. A failure of the ADFR to deploy when required is classified as a minor failure condition. An unintended deployment of the ADFR is classified as not less than a major failure condition. Note: The classification of the unintended deployment of the ADFR is driven by the risk to the people on the ground. The unintended deployment of the ADFR may also damage the aircraft. Assessing this impact when installing the article on an aircraft may result in a more stringent classification. **4 Marking** 4.1 General See CS-ETSO, Subpart A, paragraph 1.2. 4.2 Specific 4.2.1 Lettering identification The equipment shall comply with the identification requirement in EUROCAE ED-112A, Section 3-1, paragraph 3-1.8.3 as amended by Appendix 1 to this ETSO. **5 Availability of Referenced Documents** See CS-ETSO, Subpart A, paragraph 3. [Amdt ETSO/16]