Is AD 2012-26-12 a recurring Airworthiness Directive?

No — AD 2012-26-12 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-26-12 apply to?

AD 2012-26-12 applies to Thielert Aircraft Engines — models TAE 125-02-99, TAE 125-02-114, TAE 125. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-26-12

one-time

Official AD 2012-26-12 · FR doc 2012-31589 · 2013-01-09 · reciprocating engine

Airworthiness Directives; Thielert Aircraft Engines GmbH Reciprocating Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for all Thielert Aircraft Engines GmbH (TAE) TAE 125-02-99 and TAE 125-02-114 reciprocating engines. This AD requires inspection of the oil filler plug vent hole at the next scheduled maintenance or within 110 flight hours after the effective date of this AD. If chips are found to be blocking the vent hole, additional corrective action is required before next flight. This AD was prompted by an in-flight shutdown of an airplane equipped with a TAE 125-02-99 engine. We are issuing this AD to prevent engine in-flight shutdown or power loss, possibly resulting in reduced control of the airplane.

Which aircraft AD 2012-26-12 applies to

MakesThielert Aircraft Engines

ModelsTAE 125-02-99, TAE 125-02-114, TAE 125

Whether AD 2012-26-12 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 2012-26-12 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.