Is AD 2021-14-13 a recurring Airworthiness Directive?

No — AD 2021-14-13 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-14-13 apply to?

AD 2021-14-13 applies to Pratt & Whitney — models PW2037, PW2037M, PW2040, F117-PW-100, PW2000. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-14-13

one-time

Official AD 2021-14-13 · FR doc 2021-15947 · 2021-07-28 · turbine engine

Airworthiness Directives; Pratt & Whitney Turbofan Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney (PW) PW2037, PW2037M, PW2040, and F117-PW-100 model turbofan engines. This AD was prompted by a report of an uncontained engine failure resulting from cracks in the knife edge of the high- pressure turbine (HPT) 2nd-stage air seal assembly. This AD requires fluorescent penetrant inspections (FPIs) and visual inspections of the HPT 2nd-stage air seal assembly and, depending on the results of the inspections, replacement of the HPT 2nd-stage air seal assembly with a part eligible for installation. This AD also requires replacement of the affected HPT 2nd-stage air seal assembly, depending on the engine model, at either the next engine shop visit or the next piece-part opportunity. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-14-13 applies to

MakesPratt & Whitney

ModelsPW2037, PW2037M, PW2040, F117-PW-100, PW2000

Whether AD 2021-14-13 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 2021-14-13 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.