Is AD 66-14-04 a recurring Airworthiness Directive?

No — AD 66-14-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 66-14-04 apply to?

AD 66-14-04 applies to Pratt & Whitney — models Wasp Jr., R-985. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 66-14-04

one-time

AD 66-14-04 · 1966-01-01 · reciprocating engine

Airworthiness Directives; REGULATORY TEXT: 66-14-04 PRATT & WHITNEY: Amdt. 39-247 Part 39 Federal Register June 8, 1966. Applies to Pratt & Whitney Aircraft

Which aircraft AD 66-14-04 applies to

MakesPratt & Whitney

ModelsWasp Jr., R-985

Part-conditional — 3965, 331098.

Applies to Pratt & Whitney Aircraft Wasp Jr. and R-985 Series Engines. Replace cam reduction drive gear assembly P/N 3965 with cam reduction drive gear P/N 331098 at next engine overhaul, per Pratt & Whitney Aircraft Service Bulletin No. 1671, Supplement No. 1, Revision A. Amendment 39-247, Federal Register June 8, 1966.

Whether AD 66-14-04 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 66-14-04 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.