Is AD 83-21-01 a recurring Airworthiness Directive?

No — AD 83-21-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 83-21-01 apply to?

AD 83-21-01 applies to Dowty Rotol, Wsk Pzl-Rzeszow — models CR 289/3-110-F/1, CR 289/3-110-F/11, PZL-3S, CR 289/3-110-F. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 83-21-01

one-time

AD 83-21-01 · 1983-01-01 · propeller

Airworthiness Directives; accomplished. To preclude the possibility of in-flight propeller loss, accomplish the following: (a) Operation of any of the follo

Which aircraft AD 83-21-01 applies to

MakesDowty RotolWsk Pzl-Rzeszow

ModelsCR 289/3-110-F/1, CR 289/3-110-F/11, PZL-3S, CR 289/3-110-F

Prohibits operation of specified WSK PZL-3S engine / Dowty Rotol CR 289/3-110-F propeller combinations to preclude in-flight propeller loss; full combination list truncated in source text.

Whether AD 83-21-01 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 83-21-01 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.

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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.