Is AD 91-10-09 a recurring Airworthiness Directive?

No — AD 91-10-09 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 91-10-09 apply to?

AD 91-10-09 applies to Boeing — models 767. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 91-10-09

one-time

AD 91-10-09 · 1991-01-01 · airframe

Airworthiness Directives; BOEING Model 767 Series Airplanes

Which aircraft AD 91-10-09 applies to

MakesBoeing

Models767

Serial-conditional — narrows to serials 300–307.

Model 767 series airplanes, line number 300 through 307, certificated in any category. Relates to lightening and access holes in the vertical stabilizer forward closure rib, per Boeing Alert Service Bulletin 767-55A0007, dated June 22, 1989, or Revision 1, dated May 24 [year truncated]. Serial_ranges here reflect Boeing production line numbers, not serial numbers.

Whether AD 91-10-09 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 91-10-09 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.