Is AD 75-12-11 a recurring Airworthiness Directive?

No — AD 75-12-11 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 75-12-11 apply to?

AD 75-12-11 applies to Lockheed — models L-1011-385-1, L-1011. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 75-12-11

one-time

AD 75-12-11 · 1975-01-01 · airframe

Airworthiness Directives; HEADING: LOCKHEED Model L-1011-385-1 Series Airplanes ACTION: SUMMARY: DATES: Effective September 2, 1975. ADDRESSES: FOR FURTHER

Which aircraft AD 75-12-11 applies to

MakesLockheed

ModelsL-1011-385-1, L-1011

Certificated in all categories, with Collins FCS-110 autopilot installed (to prevent possible unwanted pitch-up).

Whether AD 75-12-11 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 75-12-11 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.