Is AD 2026-12-01 a recurring Airworthiness Directive?

No — AD 2026-12-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2026-12-01 apply to?

AD 2026-12-01 applies to Pilatus Aircraft Ltd. — models PC-12/47E, PC-12. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2026-12-01

one-time

Official AD 2026-12-01 · FR doc 2026-11528 · 2026-06-09 · airframe

Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. (Pilatus) Model PC-12/47E airplanes. This AD was prompted by a report of the stall warning protection system (SWPS) engaging when not appropriate. This AD requires updating operational software and incorporating a pilot's operating handbook (POH) temporary revision (TR). This AD also prohibits the installation of affected software. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2026-12-01 applies to

MakesPilatus Aircraft Ltd.

ModelsPC-12/47E, PC-12

Serial-conditional — narrows to serials 1720–1720, 2001–2476.

Whether AD 2026-12-01 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 2026-12-01 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 →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.