Is AD 2021-26-15 a recurring Airworthiness Directive?

No — AD 2021-26-15 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2021-26-15

Q: Which aircraft does AD 2021-26-15 apply to?

AD 2021-26-15 applies to Vulcanair S.P.A. — models P.68C, P.68C-TC, P.68 OBSERVER, P.68 OBSERVER 2, P.68R, P.68TC OBSERVER, P.68. Serial/part conditions may narrow it to specific aircraft.

one-time

Official AD 2021-26-15 · FR doc 2022-00056 · 2022-01-11 · airframe

Airworthiness Directives; Vulcanair S.p.A. Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain km, Vulcanair S.p.A. Model P.68C, P.68C-TC, P.68 "OBSERVER," P.68 OBSERVER 2, P.68R, and P.68TC OBSERVER airplanes. This AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI identifies the unsafe condition as a damaged stabilator trim control cable. This AD requires inspecting the stabilator trim control cables and replacing if necessary. This AD also requires reporting the results of each inspection to Vulcanair S.p.A. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-26-15 applies to

MakesVulcanair S.P.A.

ModelsP.68C, P.68C-TC, P.68 OBSERVER, P.68 OBSERVER 2, P.68R, P.68TC OBSERVER, P.68

Serial-conditional — narrows to serials 333–333, 337–339, 378–378, 379–379, 383–?.

Part-conditional — 5.6067-1, 5.6161-1, 5.6171-1, 5.6231-2, 5.6231-4.

Applies only to airplanes with a stabilator trim control cable of the listed part number installed. Serial number range 383 and larger excludes serial numbers 387 and 398.

Whether AD 2021-26-15 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 2021-26-15 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 →Read the full directive (Federal Register)

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.