Is AD 79-14-01 a recurring Airworthiness Directive?

No — AD 79-14-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 79-14-01

Q: Which aircraft does AD 79-14-01 apply to?

AD 79-14-01 applies to De Havilland Aircraft Of Canada, Limited — models DHC-6 Series Twin Otter, DHC-6. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 79-14-01 · 1979-01-01 · airframe

Airworthiness Directives; Aircraft, certificated in all categories, S/N 331 through 563 inclusive, 565 through 587 inclusive, 589 through 598 inclusive, 600

Which aircraft AD 79-14-01 applies to

MakesDe Havilland Aircraft Of Canada, Limited

ModelsDHC-6 Series Twin Otter, DHC-6

Serial-conditional — narrows to serials 331–563, 565–587, 589–598, 600–600, 601–601, 603–603, 604–604.

Modification per Mod No. 6/1679, noted in S/B No. 6/379 (applicability read from the AD teaser — confirm exact model/serial from the records.)

Whether AD 79-14-01 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 79-14-01 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.