Is AD 98-09-15 a recurring Airworthiness Directive?

No — AD 98-09-15 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-09-15 apply to?

AD 98-09-15 applies to General Electric — models GE90-76B, GE90. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-09-15

one-time

Official AD 98-09-15 · FR doc 98-11440 · 1998-05-06 · turbine engine

Airworthiness Directives; General Electric Company Model GE90-76B Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to General Electric Company (GE) Model GE90-76B turbofan engines, that requires reduced life limits for certain rotating components. This amendment is prompted by the results of a refined life analysis performed by the manufacturer which revealed minimum calculated low cycle fatigue lives lower than the published low cycle fatigue retirement lives for certain rotating components. The actions specified by this AD are intended to prevent a low cycle fatigue failure of a rotating component and possibly an uncontained engine failure.

Which aircraft AD 98-09-15 applies to

MakesGeneral Electric

ModelsGE90-76B, GE90

Installed on but not limited to Boeing 777 series aircraft.

Whether AD 98-09-15 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 98-09-15 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.