Is AD 2024-12-04 a recurring Airworthiness Directive?

No — AD 2024-12-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2024-12-04 apply to?

AD 2024-12-04 applies to Pratt & Whitney — models PW2037, PW2037M, PW2040. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2024-12-04

one-time

Official AD 2024-12-04 · FR doc 2024-14936 · 2024-07-09 · turbine engine

Airworthiness Directives; Pratt & Whitney Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney (PW) Model PW2037, PW2037M, and PW2040 engines with a certain high-pressure turbine (HPT) 2nd stage blade assembly installed. This AD was prompted by an in-flight shutdown (IFSD) caused by the fracture of HPT 2nd stage turbine hub assembly lugs, which resulted in blade liberation and a titanium fire in the high-pressure compressor (HPC). This AD requires a visual inspection of the HPT 2nd stage blade assemblies for missing contact marks, a dimensional shadowgraph inspection of the HPT 2nd stage blade assemblies for blade root profile dimensional deviations, and an eddy current inspection (ECI) of the HPT 2nd stage turbine hub assembly for conforming slot flatness. This AD also requires removal from service and replacement of any HPT 2nd stage turbine hub assembly or HPT 2nd stage blade assembly that does not pass any inspection. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2024-12-04 applies to

MakesPratt & Whitney

ModelsPW2037, PW2037M, PW2040

Part-conditional — 1B7522.

Applies only when a high-pressure turbine (HPT) 2nd stage blade assembly, part number 1B7522, is installed.

Whether AD 2024-12-04 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 2024-12-04 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.