Is AD 2012-21010 a recurring Airworthiness Directive?

No — AD 2012-21010 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2012-21010

Q: Which aircraft does AD 2012-21010 apply to?

AD 2012-21010 applies to Honeywell International Inc. — models TFE731-5, TFE731-5AR, TFE731-5BR, TFE731-4, TFE731-4R, TFE731-5R, TFE731. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 2012-21010 · 2012-08-28 · turbine engine

Airworthiness Directives; Honeywell International Inc. Turbofan Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Honeywell International Inc. models TFE731-4, -4R, -5, -5R, -5AR, and - 5BR series turbofan engines. This AD was prompted by a report of a rim/ web separation of a first stage low-pressure turbine (LPT1) rotor assembly. This AD requires replacing affected LPT1 rotor assemblies with assemblies eligible for installation. We are issuing this AD to prevent uncontained disk separation, engine failure, and damage to the airplane.

Which aircraft AD 2012-21010 applies to

MakesHoneywell International Inc.

ModelsTFE731-5, TFE731-5AR, TFE731-5BR, TFE731-4, TFE731-4R, TFE731-5R, TFE731

Part-conditional — 3075184-2, 3075184-3, 3075184-4, 3075447-1, 3075447-2, 3075447-4, 3075713-1, 3075713-2.

Applies only when a first-stage low-pressure turbine (LPT1) rotor assembly with a listed part number is installed; the specific P/N set applicable differs by engine model per subparagraphs (1)-(3) of the AD.

Whether AD 2012-21010 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 2012-21010 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.