Is AD 47-33-01 a recurring Airworthiness Directive?

No — AD 47-33-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 47-33-01 apply to?

AD 47-33-01 applies to Douglas — models DC-4, C-54. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 47-33-01

one-time

AD 47-33-01 · 1947-01-01 · airframe

Airworthiness Directives; thereafter not to exceed 250 hours flight time, or in the case of Scheduled Air Carrier Operations, at each major inspection close

Which aircraft AD 47-33-01 applies to

MakesDouglas

ModelsDC-4, C-54

Mandatory rework required thereafter at intervals not to exceed 250 flight hours (or, for Scheduled Air Carrier Operations, at each major inspection closest to 250 hours) until accomplished.

Whether AD 47-33-01 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 47-33-01 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.