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Airworthiness Directive 97-04-03

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Official AD 97-04-03 · FR doc 97-5512 · 1997-03-06 · turbine engine

Airworthiness Directives; AlliedSignal Inc. TFE731 Series Turbofan Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to AlliedSignal Inc. TFE731 series turbofan engines, that requires removal from service of certain first stage low pressure turbine (LPT) seal plates prior to accumulating the new, reduced cyclic life limit, and replacement with serviceable LPT seal plates. This amendment is prompted by a report that the machined LPT seal plate geometry did not meet the design intent due to drawing ambiguity. The actions specified by this AD are intended to prevent fatigue cracking and subsequent uncontained failure of an LPT seal plate.

Which aircraft AD 97-04-03 applies to

MakesAlliedsignal
ModelsTFE731-2A, TFE731-3C, TFE731-3CR, TFE731
Part-conditional — 3073552-2, 3074053-1.

Applies only to engines with first stage low pressure turbine (LPT) seal plates P/N 3073552-2 or P/N 3074053-1 installed.

Whether AD 97-04-03 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 97-04-03 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.