AD 2022-02-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
certain oil and fuel check valves are susceptible to cracking, which may lead to fuel or oil leakage, and loss of fuel supply to the engine, possibly resulting in an engine in-flight shut-down or fire and subsequent loss of control of the helicopter.
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Required Actions
determining whether the affected oil and fuel check valves are installed, visually inspecting the oil and fuel check valves for any crack, and depending on the inspection results, removing certain parts from service, replacing the affected parts with serviceable parts, and prohibiting the installation of affected parts as specified in EASA AD 2021-0126.
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Compliance Time
Before further flight
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Affected Aircraft
Leonardo S.p.a. Model AB412 and AB412 EP helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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