Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
Published Date: 7/30/2026
Rule
Summary
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.
Analyzed Economic Effects
2 provisions identified: 1 benefits, 1 costs, 0 mixed.
Pilatus PC-12/47E POH must be revised
If you operate a Pilatus Model PC-12/47E with serial number 1720 or 2001–2999, you must insert the specified Pilot's Operating Handbook Temporary Revision (TR No. 31) into the Normal Procedures section by September 3, 2026. The TR provides an enhanced engine start procedure to prevent an undetected interstage turbine temperature (ITT) exceedance that could cause engine failure and loss of thrust.
Compliance cost and who may do it
The FAA estimates this AD affects 265 U.S.-registered airplanes and will cost $85 per airplane (1 work-hour at $85), for a total estimated U.S. cost of $22,525. The POH revision may be performed by the owner/operator pilot holding at least a private pilot certificate and must be recorded in the aircraft records per 14 CFR 43.9(a) and 91.417(a)(2)(v).
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