Superseded. This AD was superseded by AD 2022-03-03. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2021-22-20
Effective 11/16/2021 · Published 11/01/2021
Airworthiness Directives; Austro Engine GmbH Engines
Summary
The FAA is adopting a new airworthiness directive (AD) for certain Austro Engine GmbH E4 and E4P model diesel piston engines. This AD was prompted by reports of failure of the high-pressure pump (HPP) driving gear and a subsequent determination that a batch of HPP driving gears may have been damaged during assembly. This AD requires, for engines with an affected cylinder head, inspection of the HPP driving gear and,…