Is AD 96-17-11 a recurring Airworthiness Directive?

No — AD 96-17-11 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 96-17-11 apply to?

AD 96-17-11 applies to Pratt & Whitney — models JT9D-7R4, JT9D. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 96-17-11

one-time

Official AD 96-17-11 · FR doc 96-22771 · 1996-09-17 · turbine engine

Airworthiness Directives; Pratt & Whitney JT9D-7R4 Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to Pratt & Whitney (PW) JT9D-7R4 series turbofan engines, that requires replacement of 3rd, 4th, and 5th stage low pressure turbine (LPT) vane retention bolts and nuts, the removal of the 5th stage vane configuration which includes an electro-discharge machined (EDM) slot and replacement with a cast slot configuration, and prohibits the use of uncured anti-gallant compound on vane retention hardware. This amendment is prompted by reports of LPT failures that resulted in uncontained engine failures. The actions specified by this AD are intended to prevent LPT vane failures, which can result in uncontained engine failure, fire, and possible damage to the aircraft.

Which aircraft AD 96-17-11 applies to

MakesPratt & Whitney

ModelsJT9D-7R4, JT9D

Whether AD 96-17-11 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 96-17-11 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.