AD 2021-22-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
heat damage of the engine combustion chamber D1 drain hose, which in a case where the right-hand engine is operated in the one engine inoperative (OEI) rating, the D1 drain pipe could transfer so much heat to the nearby fuel system vent pipe that its internal surface temperature could exceed the auto-ignition temperature for fuel.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
installing the engine combustion chamber D1 drain assembly, part number 8G7170P00111, as specified in EASA AD 2019-0039.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the compliance times specified, unless already done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Leonardo S.p.a. Model AW189 helicopters, certificated in any category, as identified in European Union Aviation Safety Agency (EASA) AD 2019-0039, dated February 20, 2019 (EASA AD 2019-0039).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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