Is AD 81-15-51 R1 a recurring Airworthiness Directive?

No — AD 81-15-51 R1 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 81-15-51 R1 apply to?

AD 81-15-51 R1 applies to Rockwell — models NA-265-60, NA-265-80. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 81-15-51 R1

one-time

AD 81-15-51 R1 · 1981-01-01 · airframe

Airworthiness Directives; ROCKWELL Models NA-265-60 and NA-265-80 Airplanes

Which aircraft AD 81-15-51 R1 applies to

MakesRockwell

ModelsNA-265-60, NA-265-80

Applies to NA-265-60 airplanes modified per STC SA687NW and equipped with Lear Siegler Flap Actuation System, and NA-265-80 airplanes modified per STC SA847NW; to prevent improper flap motion from flap actuation system failure.

Whether AD 81-15-51 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 81-15-51 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.