Is AD 2021-23879 a recurring Airworthiness Directive?

No — AD 2021-23879 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-23879 apply to?

AD 2021-23879 applies to Ge Aviation Czech S.R.O. — models H80-200, H85-200, H80, H85. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-23879

one-time

AD 2021-23879 · 2021-11-03 · turboprop engine

Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Turboprop Engines

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 2018-16-10 which applied to certain GE Aviation Czech s.r.o. (GEAC) H80-200 model turboprop engines. AD 2018-16-10 required an adjustment of the engine push-pull control and replacement of the beta switch to prevent the propeller governor control from going to a negative thrust position. This AD requires an initial inspection and adjustment of the engine push-pull control and replacement of the beta switch. This AD also requires inspection and adjustment of the engine push-pull control after any maintenance, repair or modification that affects the push- pull control and installation of an improved push-pull control. This AD also expands the applicability to include GEAC H85-200 model turboprop engines with Avia Propeller AV-725 propellers installed. This AD was prompted by an accident involving an Aircraft Industries (AI) L 410 UVP-E20 airplane caused by one propeller going to a negative thrust position during the landing approach. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-23879 applies to

MakesGe Aviation Czech S.R.O.

ModelsH80-200, H85-200, H80, H85

Part-conditional — P-W22-1.

Applies to (1) H80-200 engines with propeller governor P/N P-W22-1 and Avia Propeller AV-725 propellers installed, and (2) H85-200 (build configuration BC04) engines with Avia Propeller AV-725 propellers installed.

Whether AD 2021-23879 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Supersedes AD 2018-16-10.

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 2021-23879 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.