Is AD 2002-09-01 a recurring Airworthiness Directive?

Yes — AD 2002-09-01 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2002-09-01 apply to?

AD 2002-09-01 applies to Pratt & Whitney. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2002-09-01

recurring

Official AD 2002-09-01 · FR doc 02-10274 · 2002-05-02 · turbine engine

Airworthiness Directives; Pratt & Whitney 4000 Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), that is applicable to Pratt & Whitney (PW) PW4090, PW4090-3, PW4074D, PW4077D, PW4090D, and PW4098 turbofan engines with 15th stage high pressure compressor (HPC) disks having certain part numbers (P/N's). This amendment requires initial and repetitive borescope inspections of 15th stage HPC disks for cracks in the knife edges, eddy current inspections (ECI's) of blade loading slots if required, and removal of cracked disks. In addition, this amendment requires the removal from service of these P/N disks, at a new lower cyclic life limit. This amendment is prompted by two reports of 15th stage HPC disks with cracks in the outer rim front rail of the blade loading slots, and in the front forward and middle knife edges. The actions specified by this AD are intended to prevent 15th stage HPC disk failures from cracks, which could result in an uncontained engine failure.

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 2002-09-01 applies to

MakesPratt & Whitney

Part-conditional — 56H015, 57H715.

Boilerplate applicability only; specific PW engine model list precedes this excerpt and is not included (referenced service bulletin document number is PW4G-112-A72-242, dated May 1, 2001). Requires initial and repetitive borescope/eddy-current inspections of the 15th stage HPC disk front rail/knife edges, and establishes a new cyclic life limit of 8,000 cycles-since-new for 15th stage HPC disks P/N 56H015 and 57H715, to prevent disk cracking and uncontained engine failure.

Whether AD 2002-09-01 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 2002-09-01 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.