Is AD 53-19-01 a recurring Airworthiness Directive?

No — AD 53-19-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 53-19-01 apply to?

AD 53-19-01 applies to Douglas, Eclipse-Pioneer — models DC-4, C-54. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 53-19-01

one-time

AD 53-19-01 · 1953-01-01 · appliance

Airworthiness Directives; DOUGLAS: Applies to All DC-4 and C54-DC Series Aircraft Utilizing Eclipse-Pioneer Type 901 Generators. To be accomplished by the n

Which aircraft AD 53-19-01 applies to

MakesDouglasEclipse-Pioneer

ModelsDC-4, C-54

Part-conditional — 866570.

Douglas DC-4 and C-54 series aircraft with Eclipse-Pioneer Type 901 generators: fire-hazard magnesium cooling fan must be removed and Eclipse-Pioneer spacer P/N 866570 installed in its place, by next engine overhaul, not later than April 1, 1954 (Eclipse-Pioneer Service Bulletin No. 505).

Whether AD 53-19-01 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 53-19-01 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.