Is AD 2021-24-10 a recurring Airworthiness Directive?

No — AD 2021-24-10 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-24-10 apply to?

AD 2021-24-10 applies to Austro Engine Gmbh — models E4, E4P. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-24-10

one-time

Official AD 2021-24-10 · FR doc 2021-25259 · 2021-11-19 · reciprocating engine

Airworthiness Directives; Austro Engine GmbH Engines

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 2021-09-04 for all Austro Engine GmbH E4 and E4P model diesel piston engines. AD 2021-09-04 required replacing a certain oil pump as well as the oil filter and engine oil. This AD was prompted by reports of an oil pump blockage on E4 model diesel piston engines. This AD requires replacing a certain oil pump as well as the oil filter and engine oil. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-24-10 applies to

MakesAustro Engine Gmbh

ModelsE4, E4P

Whether AD 2021-24-10 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 2021-24-10 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.