Action
Notice of proposed rulemaking (NPRM).
Summary
We propose to adopt a new airworthiness directive (AD) for certain Austro Engine GmbH model E4 engines and for all model E4P engines. This proposed AD was prompted by reports of considerable wear on the timing chain on these engines. This proposed AD would require replacement of the timing chain and amending certain airplane flight manuals to limit use of windmill restarts. We are proposing this AD to address the unsafe condition on these products.