Is AD 63-20-03 a recurring Airworthiness Directive?

No — AD 63-20-03 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 63-20-03 apply to?

AD 63-20-03 applies to Douglas — models DC-6, DC-6A, DC-6B. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 63-20-03

one-time

AD 63-20-03 · 1963-01-01 · airframe

Airworthiness Directives; approved by the Chief, Engineering and Manufacturing Branch, FAA Western Region, before further flight, except for a ferry flight

Which aircraft AD 63-20-03 applies to

MakesDouglas

ModelsDC-6, DC-6A, DC-6B

Wing spar cap repair/replacement approved by the Chief, Engineering and Manufacturing Branch, FAA Western Region, required before further flight (except a ferry flight per CAR 1.76); when the new spar cap is installed, the original splice may be reworked or replaced with a redesigned splice.

Whether AD 63-20-03 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 63-20-03 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.