Is AD 98-04-14 a recurring Airworthiness Directive?

Yes — AD 98-04-14 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 98-04-14 apply to?

AD 98-04-14 applies to Pratt & Whitney — models PW4164, PW4168, PW4168A. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-04-14

recurring

Official AD 98-04-14 · FR doc 98-3799 · 1998-02-26 · turbine engine

Airworthiness Directives; Pratt & Whitney PW4164, PW4168, and PW4168A Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to Pratt & Whitney PW4164, PW4168, and PW4168A series turbofan engines. This action requires initial and repetitive inspections for loose or broken front pylon mount bolts, replacement, if necessary, with new bolts, and establishment of a new cyclic life limit. This amendment is prompted by new flight test data that indicate higher than predicted loads. The actions specified in this AD are intended to prevent front pylon mount bolt failure, which could result in engine separation from the aircraft.

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 98-04-14 applies to

MakesPratt & Whitney

ModelsPW4164, PW4168, PW4168A

Part-conditional — 54T670.

Applies only to engines with front pylon mount bolts, P/N 54T670, installed. Installed on but not limited to Airbus A330 series aircraft.

Whether AD 98-04-14 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 98-04-14 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.