AD 2023-12-24
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | WALTER Engines a.s. | M601E-11AS | Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Engines |
| aircraft | Aviat | Various | Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Engines |
Unsafe Condition
multiple failures of the needle bearing installed in propeller governors having part numbers (P/Ns) P-W11-1 or P-W11-2, caused by self-generated debris from the needle bearing, which led to oil contamination.
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Required Actions
Perform all required actions and compliance times specified in, and in accordance with, EASA AD 2022-0234. Except as specified in paragraph (h) of this AD: Remove and replace the affected propeller governors with a redesigned propeller governor.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
GE Aviation Czech s.r.o. Model M601E-11AS, M601E-11S, H75-100, H80-100, and H85-100 engines, as identified in European Union Aviation Safety Agency (EASA) AD 2022-0234, dated December 1, 2022 (EASA AD 2022-0234).
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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