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Airworthiness Directive 97-14-07

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Official AD 97-14-07 · FR doc 97-17278 · 1997-07-03 · airframe

Airworthiness Directives; Lockheed Model L-1011 Series Airplanes Equipped With Rolls-Royce Model RB211-524 Series Engines

What this AD requires

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Lockheed Model L-1011 series airplanes, that currently requires several modifications of the engine high speed gearboxes. This amendment requires that a new modification be installed in lieu of one of those previously required. This amendment is prompted by a report indicating that one of the currently required modifications is not completely effective because it can create interference problems between the fireloop and a fuel line. The actions specified by this AD are intended to reduce the possibility of a fire in the high speed gear boxes, and to ensure that any fire which may occur is readily detected by the flight crew.

Which aircraft AD 97-14-07 applies to

MakesLockheed

Applies to airplanes identified in the preceding applicability provision, addressing fire protection of the high-speed gearbox on the number 1, 2, and 3 engines: vent tube installation per Rolls-Royce Service Bulletin RB.211-72-4666, Revision 4; breather duct modification per Lockheed Service Bulletin 093-71-067, Revision 2; and additional/modified fire detection system per Lockheed Service Bulletin 093-26-039, Revision 1. Earlier compliance under prior SB revisions is credited per Notes 2 and 3.

Whether AD 97-14-07 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 97-14-07 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.