Is AD 47-42-20 a recurring Airworthiness Directive?

No — AD 47-42-20 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 47-42-20 apply to?

AD 47-42-20 applies to Univair Aircraft Corporation — models 415-C, 415-CD, 415-D, 415. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 47-42-20

one-time

AD 47-42-20 · 1947-01-01 · airframe

Airworthiness Directives; brazed to this lower shaft fitting's bearing surface, the shaft should be replaced and the defective shaft returned to the manufac

Which aircraft AD 47-42-20 applies to

MakesUnivair Aircraft Corporation

Models415-C, 415-CD, 415-D, 415

Requires replacement of the lower shaft fitting if the brazing to its bearing surface is defective, with return of the defective shaft to the manufacturer; corresponds to Ercoupe Service Policy Letter No. B-10.

Whether AD 47-42-20 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 47-42-20 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.