Is AD 2021-12-01 a recurring Airworthiness Directive?

Yes — AD 2021-12-01 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2021-12-01 apply to?

AD 2021-12-01 applies to Engine Alliance — models GP7270, GP7277, GP7000. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-12-01

recurring

Official AD 2021-12-01 · FR doc 2021-12302 · 2021-06-11 · turbine engine

Airworthiness Directives; Engine Alliance Turbofan Engines

What this AD requires

The FAA is superseding Airworthiness Directive (AD) 2019-25- 13, which applied to all Engine Alliance (EA) GP7270 and GP7277 model turbofan engines with a certain low-pressure compressor (LPC) 1st-stage fan blade installed. AD 2019-25-13 required an ultrasonic inspection of the affected LPC 1st-stage fan blades and replacement of any affected LPC 1st-stage fan blade that fails the inspection. This AD lowers the initial inspection threshold and requires repetitive ultrasonic inspections on affected LPC 1st-stage fan blades. This AD was prompted by a report of an in-flight shutdown (IFSD) of an engine due to the fracture of multiple LPC 1st-stage fan blades. The FAA is issuing this AD to address the unsafe condition on these products.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2021-12-01 applies to

MakesEngine Alliance

ModelsGP7270, GP7277, GP7000

Part-conditional — 5700531, 5702931, 5702931CL1, 5702931CL2.

Applies only to engines with LPC 1st-stage fan blades having the listed part numbers installed.

Whether AD 2021-12-01 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 2021-12-01 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.