Airworthiness directives › 2021-16-11
AD 2021-16-11 Airworthiness Directives; Airbus Helicopters
Models named: AS350B, AS350BA, AS350B1, AS350B2, AS350B3, AS350D, AS355E, AS355F, AS355F1, AS355F2. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Airbus Helicopters Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters, certificated in any category, with a tail rotor gearbox (TGB) actuating rod identified in paragraphs (c)(1) through (9) of this AD installed. (1) Part number (P/N) 350A27191000; (2) P/N 350A27191001; (3) P/N 350A27191002; (4) P/N 350A27191003; (5) P/N 350A27191004; (6) P/N 350A2719100401; (7) P/N 350A2719100402; (8) P/N 350A27192000; or (9) A TGB actuating rod with an unknown part number and serial number.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2019-0060, dated March 20, 2019 (EASA AD 2019-0060).
Unsafe condition
This AD was prompted by a report of reduced yaw control, during an approach for landing, that resulted from rupture of the TGB actuating rod and uncoupling of the steel sleeve from inside the external aluminum tube. The FAA is issuing this AD to address failure of a TGB actuating rod, which could result in loss of yaw control of the helicopter.
Affected ADs
None.
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