AD 2026-15-07: Pilatus Aircraft Ltd. Airplanes

What the FAA 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 that, during an engine start on the ground, the airplane battery voltage dropped to a value that resulted in an avionic system shutdown. This AD requires incorporating a temporary revision (TR) into the existing pilot's operating handbook (POH) for the affected airplanes to provide operators with instructions for an enhanced engine start procedure. The FAA is issuing this AD to address the unsafe condition on these products.

Read the full directive on the Federal Register →

Applicability

This AD applies to Pilatus Aircraft Ltd Model PC-12/47E airplanes, manufacturer serial numbers 1720 and 2001 through 2999, certificated in any category. (d) Subject Joint Aircraft System Component (JASC) Code 7720, Engine Temp. Indicating System. (e) Unsafe Condition This AD was prompted by a report that during an engine start on the ground, the airplane battery voltage dropped to a value that resulted in an avionic system shutdown. The FAA is issuing this AD to prevent takeoff when an undetected interstage turbine temperature exceedance occurs during engine start. The unsafe condition, if not addressed, could result in reduced turbine blade structural integrity with possible engine failure

Part numbers this directive names

This directive does not name specific part numbers in its text; it applies by aircraft model. See the applicability above and the manufacturer's service bulletin it references.