Superseded. This AD was superseded by AD 2025-02-12. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2023-20-03
Effective 12/11/2023 · Published 11/06/2023
Airworthiness Directives; Austro Engine GmbH Engines
Summary
The FAA is adopting a new airworthiness directive (AD) for certain Austro Engine GmbH Model E4 and E4P engines. This AD is prompted by reports of piston failures and the determination that certain batches of pistons were manufactured with a dimensional deviation in the piston pin bore and piston diameter. This AD requires repetitive engine oil analysis for aluminum content outside the acceptable limits and, if neces…