Airworthiness directives › 2022-11-20
AD 2022-11-20 Airworthiness Directives; Leonardo S.p.a. Helicopters
Models named: AB139, AW139. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Leonardo S.p.a. Model AB139 and AW139 helicopters, certificated in any category, with an affected part as identified in European Union Aviation Safety Agency (EASA) AD 2021-0259, dated November 17, 2021, and corrected November 22, 2021 (EASA AD 2021-0259).
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, EASA AD 2021-0259.
Unsafe condition
This AD was prompted by a large crack detected on the tail gearbox (TGB) fitting during a scheduled inspection and the determination that certain TGB fittings are required to be inspected by the use of a borescope. The FAA is issuing this AD to detect cracks on the TGB fitting. The unsafe condition, if not addressed, could result in crack propagation up to a critical length, reduced load capability of the TGB and tail rotor, and subsequent reduced control of the helicopter.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1