Is AD 47-20-09 a recurring Airworthiness Directive?

No — AD 47-20-09 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 47-20-09 apply to?

AD 47-20-09 applies to Erco — models Ercoupe. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 47-20-09

one-time

AD 47-20-09 · 1947-01-01 · airframe

Airworthiness Directives; amperes for periods of time up to 20 minutes after starting. The charging rate should reduce to 2 amperes or less within 2 hours o

Which aircraft AD 47-20-09 applies to

MakesErco

ModelsErcoupe

Generator charging rate of several amperes permitted for up to 20 minutes after starting, but must reduce to 2 amperes or less within 2 hours of operation; also covered by Ercoupe Service Department Memorandum No. 23.

Whether AD 47-20-09 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 47-20-09 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.