AD 2021-22-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
Installation of tail rotor gearbox assembly P/N 109-0440-01-115 on Model A109E helicopters that do not have overhaul or life limits for that part. If a tail rotor gearbox is not properly maintained it could fail, resulting in reduced control of the helicopter.
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Required Actions
Comply with all required actions and compliance times specified in, and in accordance with, EASA AD 2021-0031. 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 2021-0031.
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Compliance Time
Within the compliance times specified, unless already done.
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Affected Aircraft
Leonardo S.p.a. Model A109E helicopters, certificated in any category, with an affected part as identified in European Union Aviation Safety Agency (EASA) AD 2021-0031, dated January 22, 2021 (EASA AD 2021-0031) installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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