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Airworthiness Directive 97-18933

recurring
AD 97-18933 · 1997-07-17 · airframe

Airworthiness Directives; Boeing Model 757 and 767 Series Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to all Boeing Model 757 and 767 series airplanes. This action requires repetitive inspections to detect damage and to verify proper configuration of the battery ground terminations of the auxiliary power unit (APU) at the battery and connected structure; and removal, replacement, and repair of the battery ground termination, if necessary. This amendment is prompted by reports of smoke or fire coming from the APU due to battery grounds that were not installed/ maintained properly. The actions specified in this AD are intended to detect and correct such APU battery grounds, which could result in heat damage and consequent smoke/fire on 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 97-18933 applies to

MakesBoeing
Models767

applicability derived from the AD summary — confirm the model/serial from the records

Whether AD 97-18933 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 97-18933 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.