Is AD 2000-23-14 a recurring Airworthiness Directive?

Yes — AD 2000-23-14 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2000-23-14 apply to?

AD 2000-23-14 applies to Pratt & Whitney — models JT9D-7R4D, JT9D. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2000-23-14

recurring

Official AD 2000-23-14 · FR doc 00-29212 · 2000-11-20 · turbine engine

Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Pratt & Whitney JT9D series turbofan engines. This AD will require installation of an improved No. 4 bearing internal oil pressure tube, initial and repetitive inspections of the No. 4 bearing oil pressure tube for turbine exhaust case (TEC) strut clearance and alignment, and, if necessary, replacement with serviceable parts. This amendment is prompted by loss of integrity in the oil system that allows oil to migrate into high temperature metal cavities in the turbine exhaust case and cause oil fires. The actions specified by this AD are intended to prevent oil fires in and around the No. 4 bearing area that could cause excessive thermal growth of the sixth stage low pressure turbine (LPT) disk, liberation of the sixth stage LPT disk, uncontained engine failure, and damage to the airplane.

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 2000-23-14 applies to

MakesPratt & Whitney

ModelsJT9D-7R4D, JT9D

Source text is a comment-response/preamble excerpt rather than a clean applicability paragraph. AD applies to PW JT9D-7R4D series turbofan engines (BG 700/BG 900 build series), addressing turbine exhaust case (TEC) strut oil pressure tube inspection; installed on Boeing airplanes and, per rulemaking response, Airbus A300 airplanes.

Whether AD 2000-23-14 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 2000-23-14 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.