Is AD 75-09-13 a recurring Airworthiness Directive?

No — AD 75-09-13 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 75-09-13

Q: Which aircraft does AD 75-09-13 apply to?

AD 75-09-13 applies to Continental, Teledyne Continental, Teledyne-Continental, Tcm — models TSIO-470, TSIO-520, GTSIO-520. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 75-09-13 · 1975-01-01 · reciprocating engine

Airworthiness Directives; HEADING: TELEDYNE CONTINENTAL MOTORS Model TSIO-470-B, TSIO-470-C, TSIO-470-D, TSIO-520-B, TSIO-520-D, TSIO-520-E, GTSIO-520-C, GT

Which aircraft AD 75-09-13 applies to

MakesContinentalTeledyne ContinentalTeledyne-ContinentalTcm

ModelsTSIO-470, TSIO-520, GTSIO-520

Continental TSIO-470 / TSIO-520 / GTSIO-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 75-09-13 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 75-09-13 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.