Is AD 81-06-53 R1 a recurring Airworthiness Directive?

No — AD 81-06-53 R1 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 81-06-53 R1 apply to?

AD 81-06-53 R1 applies to Sikorsky. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 81-06-53 R1

one-time

AD 81-06-53 R1 · 1981-01-01 · appliance

Airworthiness Directives; certificated in all categories, equipped with P/N S6235-20213 (Goodyear 9430301) or P/N S62350-22013-101 (Goodyear 4000277) rotor

Which aircraft AD 81-06-53 R1 applies to

MakesSikorsky

Part-conditional — S6235-20213, 9430301, S62350-22013-101, 4000277.

Applies to rotor brake discs P/N S6235-20213 (Goodyear 9430301) or P/N S62350-22013-101 (Goodyear 4000277); visual/dye-penetrant inspection per Sikorsky Alert Service Bulletin 62B35-12. Specific aircraft model not stated in available excerpt.

Whether AD 81-06-53 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 81-06-53 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.