Is AD 2008-22-23 a recurring Airworthiness Directive?

No — AD 2008-22-23 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2008-22-23 apply to?

AD 2008-22-23 applies to Thielert Aircraft Engines Gmbh — models TAE 125-02-99, TAE 125. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2008-22-23

one-time

Official AD 2008-22-23 · FR doc E8-25892 · 2008-11-04 · reciprocating engine

Airworthiness Directives; Thielert Aircraft Engines GmbH (TAE) Model TAE 125-02-99 Reciprocating Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for the product listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

Which aircraft AD 2008-22-23 applies to

MakesThielert Aircraft Engines Gmbh

ModelsTAE 125-02-99, TAE 125

Part-conditional — 05-7211-K000304.

Applies only to engines with clutch, part number 05-7211-K000304, installed. Installed on, but not limited to, Cessna 172 and (Reims-built) F172 series (STC No. SA01303WI) and Diamond DA42 airplanes.

Whether AD 2008-22-23 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 2008-22-23 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.