AD 2018-18-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Austro | Engine GmbH | Airworthiness Directives; Austro Engine GmbH Engines |
Unsafe Condition
Considerable wear of the timing chain has been detected on some engines. This may have been caused by windmilling restarts, which are known to cause high stress to the timing chain. This condition, if not detected and corrected, could lead to failure of the timing chain and consequent engine power loss, possibly resulting in reduced control of the aeroplane.
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Required Actions
Replace the timing chain for engines with known windmilling restarts, and require amendment of the applicable Aircraft Flight Manual (AFM).
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Compliance Time
Before further flight
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Affected Aircraft
Austro Engine GmbH model E4 engines with serial numbers that have a "-B" or "-C" configuration and to model E4P engines, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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