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Airworthiness Directive 73-21-03

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AD 73-21-03 · 1973-01-01 · airframe

Airworthiness Directives; these documents from the manufacturer may obtain copies upon request to the Service Manager, Bell Helicopter Company, P.O. Box 482

Which aircraft AD 73-21-03 applies to

MakesBell Helicopter Textron Canada Limited
Models206A, 206B, 206

Scraped applicability text is administrative boilerplate (document-availability notice); models identified from footer. Amendment effective November 15, 1973.

Whether AD 73-21-03 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 73-21-03 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.

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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.