Is AD 97-01-05 a recurring Airworthiness Directive?

Yes — AD 97-01-05 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 97-01-05 apply to?

AD 97-01-05 applies to Williams International — models FJ44-1A, FJ44. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 97-01-05

recurring

Official AD 97-01-05 · FR doc 97-31 · 1997-01-06 · turbine engine

Airworthiness Directives; Williams International, L.L.C. Model FJ44-1A Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to Williams International, L.L.C. Model FJ44-1A turbofan engines. This action requires initial and repetitive eddy current inspections (ECI) for possible cracks in high pressure turbine (HPT) disk blade retention posts. In addition, this AD requires the installation of advanced design HPT disks as terminating action to the inspection requirements of this AD. This amendment is prompted by two incidents of HPT disk blade retention post separations. The actions specified in this AD are intended to locate possible cracks in HPT disk blade retention posts, thereby preventing the separation of these posts and the liberation of the turbine blades that they retain, and a subsequent loss of engine power. In addition, the actions specified in this AD are intended to prevent the possible high disk speed uncontained liberation of disk posts and turbine blades, which could cause aircraft damage.

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 97-01-05 applies to

MakesWilliams International

ModelsFJ44-1A, FJ44

Serial-conditional — narrows to serials 1001–1179, 1196–1196, 1197–1197.

Applies only to engines with serial numbers 1001 through 1179, 1196, and 1197.

Whether AD 97-01-05 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 97-01-05 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.