Is AD 97-27350 a recurring Airworthiness Directive?

No — AD 97-27350 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 97-27350 apply to?

AD 97-27350 applies to Alliedsignal, Textron Lycoming — models T5313B, T5317A, T5313, T5317, T53. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 97-27350

one-time

AD 97-27350 · 1997-10-17 · turboshaft engine

Airworthiness Directives; AlliedSignal Inc. (Formerly Textron Lycoming) Model T5313B, T5317A, and T53 (Military) Turboshaft Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to AlliedSignal Inc. (formerly Textron Lycoming) Model T5313B, T5317A, and T53 series military turboshaft engines approved for installation on aircraft certified in accordance with Section 21.25 of the Federal Aviation Regulations (FAR). This action requires a one-time visual inspection of accessory drive carrier assemblies for affected serial numbers (S/Ns) designating a defective assembly, and if the S/N is applicable, replacement with a serviceable assembly. This amendment is prompted by a report of an N2 overspeed condition due to a defective accessory drive carrier assembly. The actions specified in this AD are intended to prevent accessory drive carrier assembly failure, which could result in an N2 overspeed and an uncontained engine failure.

Which aircraft AD 97-27350 applies to

MakesAlliedsignalTextron Lycoming

ModelsT5313B, T5317A, T5313, T5317, T53

Part-conditional — 1-070-220-03, 1-070-220-12, 1-070-220-13.

Applies only when an accessory drive carrier assembly P/N 1-070-220-03, -12, or -13, installed after November 1, 1985, has a serial number listed in AlliedSignal ASB No. T5313B/17A-A0092 Revision 1 (dated July 1, 1997), ASB No. T53-L-13B-A0092 (dated June 4, 1997), or ASB No. T53-L-703-A0092 (dated June 4, 1997).

Whether AD 97-27350 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 97-27350 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.