Is AD 97-8476 a recurring Airworthiness Directive?

Yes — AD 97-8476 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Airworthiness Directive 97-8476

Q: Which aircraft does AD 97-8476 apply to?

AD 97-8476 applies to Textron Lycoming — models TIO-540-A2C, TIO-540-F2BD, TIO-540-J2B, TIO-540-J2BD, TIO-540-N2BD, TIO-540-R2AD, TIO-540-S1AD, LTIO-540-J2B. Serial/part conditions may narrow it to specific aircraft.

recurring

AD 97-8476 · 1997-04-07 · reciprocating engine

Airworthiness Directives; Textron Lycoming and Superior Air Parts, Inc.

What this AD requires

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 97-01-04 that was sent previously to all known U.S. owners and operators of certain Textron Lycoming TIO- 540, LTIO-540, and IO-540 series reciprocating engines with certain Superior Air Parts, Inc. Parts Manufacture Approval (PMA) replacement cylinder assemblies installed by individual letters. This AD requires removal from service of affected cylinder assemblies for higher time cylinder assemblies and replacement with serviceable parts, and initial and repetitive dye penetrant inspections for mid-time cylinder assemblies, or replacement with serviceable parts. This amendment is prompted by a report of an inflight engine failure of a Textron Lycoming TIO-540 reciprocating engine with affected Superior Air Parts, Inc. PMA cylinder assemblies installed. The actions specified by this AD are intended to prevent cylinder head separation, inflight loss of power, possible engine failure, and fire.

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 97-8476 applies to

MakesTextron Lycoming

ModelsTIO-540-A2C, TIO-540-F2BD, TIO-540-J2B, TIO-540-J2BD, TIO-540-N2BD, TIO-540-R2AD, TIO-540-S1AD, LTIO-540-J2B, LTIO-540-F2BD, LTIO-540-J2BD, LTIO-540-N2BD, LTIO-540-R2AD, IO-540-M1B5D, TIO-540, LTIO-540, IO-540

Serial-conditional — narrows to serials 001–650.

Part-conditional — SL54000-A1, SL54000-A2, SL54000-A2P, SL54000-A20P, SL54000-A21P.

Applies only when a Superior Air Parts, Inc. Parts Manufacture Approval (PMA) replacement cylinder assembly (P/N SL54000-A1, -A2, -A2P, -A20P, or -A21P), serial numbers 001 through 650, is installed on the listed engines.

Whether AD 97-8476 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 97-8476 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.