Is AD 55-21-02 a recurring Airworthiness Directive?

No — AD 55-21-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 55-21-02 apply to?

AD 55-21-02 applies to Piper — models PA-23. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 55-21-02

one-time

AD 55-21-02 · 1955-01-01 · airframe

Airworthiness Directives; and is accessible through the wing bottom access panel. I. Compliance required prior to next flight and at every 15 hours thereaft

Which aircraft AD 55-21-02 applies to

MakesPiper

ModelsPA-23

Prior to next flight and every 15 hours thereafter, visually inspect the wing front spar attachment fitting (accessible through the wing bottom access panel) for damage such as bent flanges or visible distortion; contact Piper Corp for instructions if damage is found before returning the airplane to flight status.

Whether AD 55-21-02 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 55-21-02 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.