Appendix C –
Background information on terrain awareness and warning systems (TAWSs)
ED Decision 2022/008/R
(a) General
This Appendix provides additional references, background information, and guidance for maintenance testing, as appropriate to TAWS installations.
(b) Related references
(1) EASA
(i) ETSO-C151b Terrain Awareness and Warning System (TAWS)
(ii) ETSO-C92c Ground Proximity Warning, Glide Slope Deviation Alerting Equipment dated 24/10/2003
(iii) ETSO-C10b Aircraft Altimeter, Pressure Actuated, Sensitive Type dated 24/10/2003
(iv) ETSO-2C87 Low Range Radio Altimeters dated 24/10/2003
(v) ETSO-C106 Air Data Computer dated 24/10/2003
(vi) ETSO-C115b Airborne Area Navigation Equipment using Multi-Sensor Inputs dated 24/10/2003
(vii) ETSO-C129a Airborne Supplemental Navigation Equipment Using Global Positioning System (GPS) dated 24/10/2003
(viii) ETSO-C145 Airborne Navigation Sensors Using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS) dated 24/10/2003 – ETSO-C145c Airborne Navigation Sensors Using the Global Positioning System Augmented by the Satellite Based Augmentation System (SBAS) dated 21/12/2010
(ix) ETSO–C146 Stand-Alone Airborne Navigation Equipment Using the Global Positioning System (GPS) Augmented by the Wide Area Augmentation System (WAAS) dated 24/10/2003 – ETSO-C146c Stand-Alone Airborne Navigation Equipment Using the Global Positioning System Augmented by the Satellite Based Augmentation System (SBAS) dated 21/12/2010
(x) ETSO-C196a Airborne Supplemental navigation Sensors for Global Positioning System Equipment Using Aircraft-Based Augmentation dated 05/07/2012
(xi) ETSO-C105 Optional Display Equipment for Weather and Ground Mapping Radar Indicators dated 24/10/2003
(2) ICAO
Doc 8168 Aircraft Operations Procedures for Air Navigation Services Fifth edition – 2006 Volume II Construction of Visual and Instrument Flight Procedures
(3) EUROCAE
(i) ED-98 () User requirements for Terrain and Obstacle Data (any edition - last edition B dated September 2012)
(ii) ED-76 Standards for processing aeronautical data dated October 1998 (identical to RTCA DO-200A)
(4) RTCA
DO-161A Minimum Performance Standards-Airborne Ground Proximity Warning Equipment dated 27/05/1976
[Issue: CS-ACNS/4]
This EASA regulation provides background and maintenance testing guidance for aircraft Terrain Awareness and Warning Systems (TAWS). It references related standards from EASA, ICAO, EUROCAE, and RTCA, including equipment standards for navigation, altimeters, air data, and ground proximity warning systems. This ensures aviation safety through improved terrain awareness.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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