Is AD 2015-00991 a recurring Airworthiness Directive?

No — AD 2015-00991 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2015-00991 apply to?

AD 2015-00991 applies to Technify Motors Gmbh — models TAE 125-01, TAE 125-02-99, TAE 125-02. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2015-00991

one-time

AD 2015-00991 · 2015-01-29 · reciprocating engine

Airworthiness Directives; Technify Motors GmbH (Type Certificate Previously Held by Thielert Aircraft Engines GmbH) Reciprocating Engines

What this AD requires

We are superseding airworthiness directive (AD) 2011-23-01 for all Technify Motors GmbH (TMG) models TAE 125-01 and TAE 125-02-99 reciprocating engines with certain part number (P/N) and serial number (S/N) clutch assemblies installed. AD 2011-23-01 required replacement of certain P/N and S/N clutch assemblies. This AD requires the same actions but expands the population of affected P/N and S/N clutch assemblies. This AD was prompted by an additional report of a clutch assembly that malfunctioned due to disk springs that received a nonconforming heat treatment process. We are issuing this AD to prevent failure of the clutch assembly, which could lead to failure of the engine, in-flight shutdown, and loss of control of the airplane.

Which aircraft AD 2015-00991 applies to

MakesTechnify Motors Gmbh

ModelsTAE 125-01, TAE 125-02-99, TAE 125-02

Part-conditional — 02-7210-11001R11, 02-7210-11001R11-AT, 02-7210-11001R13, 05-7211-K006001, 05-7211-K006002.

Applies only when a listed clutch assembly part number is installed with a serial number listed in TMG Service Bulletin No. TM TAE 125-0021, Revision 2, or TAE Service Bulletin No. TM TAE 125-1011 P1, Revision 2.

Whether AD 2015-00991 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 2011-23-01.

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 2015-00991 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.