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Airworthiness Directive 96-28988

one-time
AD 96-28988 · 1996-11-20 · turbine engine

Airworthiness Directives; Pratt & Whitney JT3D Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to Pratt & Whitney (PW) JT3D series turbofan engines, that requires inspection of steel high pressure compressor (HPC) disks for corrosion, recoating or replating those disks, or replacing those disks as necessary. This amendment is prompted by reports of a failure of a PW JT8D steel HPC disk, which is similar in design to the PW JT3D steel HPC disks. The actions specified by this AD are intended to prevent steel HPC disk failure due to corrosion, which could result in an uncontained engine failure and damage to the aircraft.

Which aircraft AD 96-28988 applies to

MakesPratt & Whitney
ModelsJT3D-1, JT3D-1A, JT3D-3, JT3D-3B, JT3D-3C, JT3D-1-MC6, JT3D-1A-MC6, JT3D-1-MC7, JT3D-1A-MC7, JT3D-7, JT3D-7A, JT3D

Whether AD 96-28988 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 96-28988 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.