Is AD 84-13-51 R1 a recurring Airworthiness Directive?

No — AD 84-13-51 R1 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 84-13-51 R1 apply to?

AD 84-13-51 R1 applies to Lockheed — models L-1011. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 84-13-51 R1

one-time

AD 84-13-51 R1 · 1984-01-01 · airframe

Airworthiness Directives; required as indicated unless previously accomplished. A. Unless the inspection requirements of paragraph B., below, have been acco

Which aircraft AD 84-13-51 R1 applies to

MakesLockheed

ModelsL-1011

Unless the 2,000-flight-hour/1,000-landing inspection alternative was already accomplished, revise AFM LR-25925 within 5 calendar days to add fuel-system limitations (fuel reserve/flight-planning requirements) to the Limitations section.

Whether AD 84-13-51 R1 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 84-13-51 R1 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.