Is AD 51-19-02 a recurring Airworthiness Directive?

No — AD 51-19-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 51-19-02 apply to?

AD 51-19-02 applies to Piper — models PA-22. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 51-19-02

one-time

AD 51-19-02 · 1951-01-01 · appliance

Airworthiness Directives; required by August 31, 1951. Overage oil radiator hose was installed in an undetermined number of Piper airplanes. Inspect immedia

Which aircraft AD 51-19-02 applies to

MakesPiper

ModelsPA-22

Serial-conditional — narrows to serials 22-1–22-90.

Overage oil radiator hose was installed in an undetermined number of Piper airplanes; inspect immediately to determine that the proper hose (marking cut off in text) is installed; compliance required by August 31, 1951; text truncated, references an additional serial range/model before the PA-22 clause that could not be determined.

Whether AD 51-19-02 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 51-19-02 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.