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Airworthiness Directive 93-04-02

one-time
AD 93-04-02 · 1993-01-01 · appliance

Airworthiness Directives; ROCKWELL INTERNATIONAL/COLLINS AVIATION DIVISION TDR-94D Mode S Transponders, P/N CPN 622-9210-002

Which aircraft AD 93-04-02 applies to

MakesRockwell International/Collins Aviation Division
ModelsTDR-94D
Part-conditional — 622-9210-002.

TDR-94D Mode S Transponder, CPN 622-9210-002. Effective March 26, 1993. Amendment 39-8504, Docket No. 93-CE-18-AD.

Whether AD 93-04-02 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 93-04-02 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.

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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.