Is AD 49-12-01 a recurring Airworthiness Directive?

No — AD 49-12-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 49-12-01

Q: Which aircraft does AD 49-12-01 apply to?

AD 49-12-01 applies to Airlift International, Curtiss-Wright Corporation, Flying Tiger Line, L. B. Smith Aircraft Corporation — models C-46A, C-46D, C-46E, C-46F, C-46. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 49-12-01 · 1949-01-01 · airframe

Airworthiness Directives; substantiating data to justify the increase. Revised December 28, 1964. FOOTER: Airlift International, Inc. Curtiss-Wright Corpora

Which aircraft AD 49-12-01 applies to

MakesAirlift InternationalCurtiss-Wright CorporationFlying Tiger LineL. B. Smith Aircraft Corporation

ModelsC-46A, C-46D, C-46E, C-46F, C-46

Revised December 28, 1964; concerns substantiating data to justify an increase (subject of increase truncated in source text).

Whether AD 49-12-01 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 49-12-01 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 →

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.