AD NO.
2021-23-12
SUBJECT
Air Transport Association (ATA) of America Code 31, Indicating/Recording System; 34, Navigation.
APPLICABILITY
This AD applies to all transport and commuter category airplanes equipped with a radio (also known as radar) altimeter. These radio altimeters are installed on various transport and commuter category airplanes including, but not limited to, the airplanes for which the design approval holder is identified in paragraphs (c)(1) through (19) of this AD. (1) The Boeing Company (2) Airbus SAS (3) Bombardier Inc. (4) Embraer S.A. (5) Gulfstream Aerospace Corporation (6) Gulfstream Aerospace LP (7) Textron Aviation Inc. (8) Pilatus Aircraft Limited (9) Fokker Services B.V. (10) Saab AB, Support and Services (11) DeHavilland Aircraft of Canada Limited (12) Airbus Canada Limited Partnership (13) ATR-GIE Avions de Transport Régional (14) Yaborã Ind[uacute]stria Aeronáutica S.A. (15) MHI RJ Aviation ULC (16) BAE Systems (Operations) Limited (17) Lockheed Martin Corporation/Lockheed Martin Aeronautics Company (18) Viking Air Limited (19) Dassault Aviation
ISSUED BY
FAA