Is AD 48-01-01 a recurring Airworthiness Directive?

No — AD 48-01-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 48-01-01 apply to?

AD 48-01-01 applies to Douglas, Goodyear — models C-54, DC-4. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 48-01-01

one-time

AD 48-01-01 · 1948-01-01 · appliance

Airworthiness Directives; Applies to C-54 and DC-4 Aircraft. Because of cracking and failure in the locking groove of Goodyear Model 20DHBM wheels, Assembly

Which aircraft AD 48-01-01 applies to

MakesDouglas Goodyear

ModelsC-54, DC-4

Part-conditional — 530402-M, 530735-M, 511284-6.

Applies to C-54 and DC-4 aircraft equipped with Goodyear Model 20DHBM wheels, Assembly No. 530402-M; cracking/failure in locking groove of one-piece flange and lock ring; replace with two-piece flange P/N 530735-M and studs P/N 511284-6 (see Goodyear Service Bulletin No. 1).

Whether AD 48-01-01 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 48-01-01 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.