Is AD 79-05-09 a recurring Airworthiness Directive?

No — AD 79-05-09 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 79-05-09

Q: Which aircraft does AD 79-05-09 apply to?

AD 79-05-09 applies to Continental, Teledyne Continental, Teledyne-Continental, Tcm — models O-470, IO-470, IO-520. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 79-05-09 · 1979-01-01 · reciprocating engine

Airworthiness Directives; HEADING: TELEDYNE CONTINENTAL MOTORS Model O-470R, O-470S, O-470U, IO-470F, IO-470L, IO-470N, IO-520BA & BB, IO-520C & CB, IO-520D

Which aircraft AD 79-05-09 applies to

MakesContinentalTeledyne ContinentalTeledyne-ContinentalTcm

ModelsO-470, IO-470, IO-520

Continental O-470 / IO-470 / IO-520 models — applicability read from the AD title (pre-1994 directive, no full text on file) — confirm the exact engine model, serial, and compliance status from the records

Whether AD 79-05-09 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 79-05-09 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.