Is AD 97-12-05 a recurring Airworthiness Directive?

No — AD 97-12-05 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 97-12-05 apply to?

AD 97-12-05 applies to General Electric — models GE90. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 97-12-05

one-time

Official AD 97-12-05 · FR doc 97-14956 · 1997-06-12 · turbine engine

Airworthiness Directives; General Electric Company GE90 Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to General Electric Company (GE) GE90 series turbofan engines. This action supersedes Telegraphic AD T97-09-51 that currently requires visual checks of the engine Debris Monitoring System (DMS) sensor for bearing debris, and, if necessary, performing procedures for additional maintenance actions. In addition, that AD requires replacing Variable Speed Constant Frequency (VSCF) gearshaft flange ball bearings that may incorporate rivets that are manufactured of improper material with serviceable bearings. This action references a later revision of the applicable Service Bulletin (SB) that includes additional engine serial numbers; however, these changes do not affect the Applicability or compliance requirements of this AD. This amendment is prompted by the issuance of the new revision to the SB. The actions specified by this AD are intended to prevent a VSCF gearshaft flange ball bearing failure, which could result in an inflight engine shutdown.

Which aircraft AD 97-12-05 applies to

MakesGeneral Electric

ModelsGE90

Part-conditional — 1650M71G03, 1650M71G04.

Applies only to engines with Accessory Gearbox (AGB) P/N 1650M71G03 or 1650M71G04 installed.

Whether AD 97-12-05 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 97-12-05 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.