Is AD 78-04-03 a recurring Airworthiness Directive?

No — AD 78-04-03 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 78-04-03 apply to?

AD 78-04-03 applies to Mcdonnell Douglas — models C-9A, C-9B, VC-9C, DC-9. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 78-04-03

one-time

AD 78-04-03 · 1978-01-01 · airframe

Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C

Which aircraft AD 78-04-03 applies to

MakesMcdonnell Douglas

ModelsC-9A, C-9B, VC-9C, DC-9

Amendment 39-3141, effective February 21, 1978. Applies to Model DC-9 Series airplanes certificated in all categories, including Military Type C-9A, C-9B, and VC-9C. Requires accomplishment per McDonnell Douglas DC-9 Alert Service Bulletin A27-189, dated October 7, 1977, or later FAA-approved revision, within the next 2000 hours time in service after [remainder cut off in source].

Whether AD 78-04-03 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 78-04-03 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.