Airworthiness Directive 49-05-03

one-time
AD 49-05-03 · 1949-01-01 · appliance

Airworthiness Directives; Continental No. 40644. Continental Service Bulletin M48-30 covers this same subject. (Ryan Navion Field Service Bulletin No. 5 out

Which aircraft AD 49-05-03 applies to

ModelsNavion
Part-conditional40644.

Concerns Continental part No. 40644 (subject also covered by Continental Service Bulletin M48-30); Ryan Navion Field Service Bulletin No. 5 gives interim precautions for airplanes equipped with the unsatisfactory [part - text cut off].

Whether AD 49-05-03 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 complianceThe specific action taken (inspected, replaced, modified) and to what revision.
DateWhen the work was done.
Aircraft timeTotal time in service / tach at compliance — how recurring next-due is computed.
Signature & certificateThe A&P/IA who returned it to service, with certificate number.
Is AD 49-05-03 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.