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Airworthiness Directive 93-06-06

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AD 93-06-06 · 1993-01-01 · propeller

Airworthiness Directives; new quill or a quill that has never been mated with a titanium nitrided transfer tube, and install an A-1 nitrided transfer tube (

Which aircraft AD 93-06-06 applies to

MakesHamilton Standard

Gated to PCU ballscrew quill/A-1 nitrided transfer tube configuration on the propeller control unit — confirm exact part/mod status and applicable aircraft from the full AD text before use.

Whether AD 93-06-06 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 93-06-06 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.