Is AD 53-05-01 a recurring Airworthiness Directive?

No — AD 53-05-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 53-05-01

Q: Which aircraft does AD 53-05-01 apply to?

AD 53-05-01 applies to Aero Spacelines, Incorporated, The Boeing Company, Kelowna Flightcraft R & D Ltd., Lockheed Aircraft Corporation — models 377MG, 377SGT, DC-6A, DC-6B, 240 Series, 749-79, 749A-79, 377. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 53-05-01 · 1953-01-01 · airframe

Airworthiness Directives; which these actions take place. FOOTER: Aero Spacelines, Incorporated The Boeing Company Kelowna Flightcraft R & D Ltd. Lockheed A

Which aircraft AD 53-05-01 applies to

MakesAero Spacelines, IncorporatedThe Boeing CompanyKelowna Flightcraft R & D Ltd.Lockheed Aircraft Corporation

Models377MG, 377SGT, DC-6A, DC-6B, 240 Series, 749-79, 749A-79, 377, DC-6, 240, 749

applicability read from the AD teaser — confirm exact model/serial from the records

Whether AD 53-05-01 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 53-05-01 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.