Is AD 54-09-01 a recurring Airworthiness Directive?

No — AD 54-09-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 54-09-01 apply to?

AD 54-09-01 applies to Fairchild — models 6-440-C2, 6-440-C3, 6-440-C4, 6-440-C5. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 54-09-01

one-time

AD 54-09-01 · 1954-01-01 · reciprocating engine

Airworthiness Directives; 4. If the hotspot has been used unheated since the last overhaul, only the initial inspection in 1. need be performed before norma

Which aircraft AD 54-09-01 applies to

MakesFairchild

Models6-440-C2, 6-440-C3, 6-440-C4, 6-440-C5

If the hotspot has been used unheated since the last overhaul, only the initial inspection need be performed before normal overhaul. Also covers military designations L-440-1, L-440-2, L-440-3, L-440-5, L-440-7.

Whether AD 54-09-01 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 54-09-01 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.