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Airworthiness Directive 98-28534

one-time
AD 98-28534 · 1998-10-26 · turbine engine

Airworthiness Directives; Pratt & Whitney PW2000 Series Turbofan Engines

What this AD requires

This amendment revises an existing airworthiness directive (AD), applicable to Pratt & Whitney PW2000 series turbofan engines, that currently requires a reduction in the cyclic service life limit for hubs, disks, airseals, blade retaining plates, and airsealing ring supports on certain high pressure turbines (HPT) and low pressure turbines (LPT), and provides for optional inspections for cracks or rework of certain HPT and LPT hardware in order to retain the original, higher cyclic service life limit for these components. This amendment clarifies questions from operators regarding 2nd stage HPT hub detail vs. assembly part numbers (P/Ns). This amendment is prompted by comments from operators describing confusion as to which 2nd stage HPT hubs, identified by P/N, needed to be removed prior to the new life limit. The actions specified by this AD are intended to prevent HPT or LPT failure, which may result in an uncontained engine failure and possible damage to the aircraft.

Which aircraft AD 98-28534 applies to

MakesPratt & Whitney
ModelsPW2037, PW2037(M), PW2040, PW2240, PW2337, PW2000

Whether AD 98-28534 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 98-28534 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.