Is AD 71-11-01 a recurring Airworthiness Directive?

No — AD 71-11-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 71-11-01 apply to?

AD 71-11-01 applies to De Havilland Canada. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 71-11-01

one-time

AD 71-11-01 · 1971-01-01 · airframe

Airworthiness Directives; in which DHC Modification No. 6/1053 has been incorporated; (d) Alter airplanes, S/Ns 136 through 289, except S/Ns 176, 221, 233,

Which aircraft AD 71-11-01 applies to

MakesDe Havilland Canada

Serial-conditional — narrows to serials 136–289.

Applies to aircraft S/Ns 136 through 289, except S/Ns 176, 221, 233, 268, and 286 (already incorporate DHC Modification No. 6/1053); alter remaining aircraft by incorporating DHC Modification No. 6/1053 or equivalent.

Whether AD 71-11-01 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 71-11-01 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.