Is AD 53-09-03 a recurring Airworthiness Directive?

No — AD 53-09-03 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 53-09-03 apply to?

AD 53-09-03 applies to Hiller — models UH-12, UH-12A, UH-12B, HTE-1, HTE-2, H-23A, H-23B. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 53-09-03

one-time

AD 53-09-03 · 1953-01-01 · airframe

Airworthiness Directives; with a pin having at least 0.030-inch radius before further flight. B. If radius is 0.030 or greater and the pin has less than 500

Which aircraft AD 53-09-03 applies to

MakesHiller

ModelsUH-12, UH-12A, UH-12B, HTE-1, HTE-2, H-23A, H-23B

Part-conditional — 51414-1.

Clevis pin P/N 51414-1 must have at least 0.030-inch radius before further flight or be replaced; pins with radius >=0.030 in. and under 500 hours total time may be reinstalled; all 51414-1 pins must be replaced upon accumulating 500 flight hours; remove featheredge at clevis base if found.

Whether AD 53-09-03 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 53-09-03 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.