Is AD 81-25-01 a recurring Airworthiness Directive?

No — AD 81-25-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 81-25-01

Q: Which aircraft does AD 81-25-01 apply to?

AD 81-25-01 applies to Woodward Governor Company, Maule Aerospace Technology, Inc. — models M-5-235C, M-5. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 81-25-01 · 1981-01-01 · appliance

Airworthiness Directives; through 1446806, 1446808, 1446809, 1446811, 1446812, 1446814 through 1446817, 1567547 through 1567562, 1567564 through 1567594, an

Which aircraft AD 81-25-01 applies to

MakesWoodward Governor CompanyMaule Aerospace Technology, Inc.

ModelsM-5-235C, M-5

Serial-conditional — narrows to serials 1446808–1446808, 1446809–1446809, 1446811–1446811, 1446812–1446812, 1446814–1446817, 1567547–1567562, 1567564–1567594, 1567596–1567612.

Applies to Woodward propeller-governor flyweights (identified only as 'Flyweights', no part number captured) installed on Maule M-5-235C airplanes; compliance per Woodward Service Bulletin 33576, dated October 1981. Serial-number list is truncated at the start in the source text (first range's starting serial not captured).

Whether AD 81-25-01 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 81-25-01 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.