Is AD 2023-09-12 a recurring Airworthiness Directive?

No — AD 2023-09-12 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2023-09-12 apply to?

AD 2023-09-12 applies to Pilatus Aircraft Ltd. — models PC-12, PC-12/45, PC-12/47, PC-12/47E. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2023-09-12

one-time

Official AD 2023-09-12 · FR doc 2023-11447 · 2023-05-31 · 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, PC-12/45, PC-12/ 47, and PC-12/47E airplanes. This AD is 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 insufficient grounding of the vapor cycle cooling system (VCCS) compressor/condenser. This AD requires inspecting the power return and chassis grounding cable attachment points at frame 37, including the attachment parts, and depending on the inspection results, corrective action. This AD also requires modifying the installation of the VCCS compressor/condenser power return cables and installing an additional isolated VCCS chassis ground cable. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2023-09-12 applies to

MakesPilatus Aircraft Ltd.

ModelsPC-12, PC-12/45, PC-12/47, PC-12/47E

Serial-conditional — narrows to serials 466–466, 467–467, 725–725, 861–861, 1032–1032, 1052–1052, 1082–1082, 1115–1115, 1232–1232, 1411–1411, 1428–1428, 1439–1439, 1530–1530, 1541–1541, 1663–1663, 1725–1725, 1802–1802.

Whether AD 2023-09-12 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 2023-09-12 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.