Is AD 2003-14-21 a recurring Airworthiness Directive?

No — AD 2003-14-21 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2003-14-21 apply to?

AD 2003-14-21 applies to Rolls-Royce — models RB211-524B-B-02, RB211-524. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2003-14-21

one-time

Official AD 2003-14-21 · FR doc 03-17949 · 2003-07-21 · turbine engine

Airworthiness Directives; Lockheed Martin Models L-1011 Airplanes and Rolls-Royce plc RB211 Series Turbofan Engines

What this AD requires

This amendment supersedes an existing airworthiness directive (AD) that is applicable to Lockheed Martin L-1011-385 series airplanes. That AD currently requires modifications of the engine turbine cooling air overheat monitoring panel at the flight engineer/second officer's console, pilot's caution and warning light panel on the main instrument panel, and the installation of a high speed gearbox (HSGB) overheat detector system into the monitoring system for the engine turbine air temperature. This amendment requires the same modifications. In addition, this amendment adds Lockheed Martin L-1011-385 series airplanes with RB211-22B-02 series engines to the applicability, requires installation of a revised engine front bearing housing assembly, installation of a revised speed probe loom electrical support assembly, and installation of a low pressure (LP) compressor shaft extreme axial movement detector system. Also, this amendment requires additional modifications to the engine turbine cooling air overheat monitoring panel at the flight engineer/second officer's console, pilot's caution and warning light panel on the main instrument panel. The actions specified by this AD are intended to prevent undetected fires originating within the HSGB from breaching the HSGB case, which could result in engine damage and increased difficulty in extinguishing a fire, and to prevent undetected LP compressor shaft location bearing failure, which could result in LP compressor and turbine shaft assembly failure, turbine overspeed, and possible uncontained engine failure.

Which aircraft AD 2003-14-21 applies to

MakesRolls-Royce

ModelsRB211-524B-B-02, RB211-524

Source text is a preamble comment-response discussion, not the applicability paragraph itself. Discusses model RB211-524B-B-02 engines (not currently FAA-approved for the Lockheed L-1011 but may be in service on other airplanes) and other RB211-524 series engines installed on Lockheed L-1011 airplanes

Whether AD 2003-14-21 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 2003-14-21 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.