Federal Register #2026-15467

FAA Mandates Safety Procedure Update for Pilatus PC-12/47E Aircraft

The Federal Aviation Administration (FAA) has issued a regulatory airworthiness directive (AD) for Pilatus Aircraft Ltd. Model PC-12/47E airplanes to address a critical safety concern. - Government Buyer: - Federal Aviation Administration (FAA) - OEM Highlight: - Pilatus Aircraft Ltd. is the sole OEM mentioned - Requirement Overview: - Mandates incorporation of Temporary Revision No. 31 (TR No. 31) into the Pilots Operating Handbook (POH) for affected PC-12/47E aircraft - Applies to serial numbers 1720 and 2001-2999, covering 265 U.S.-registered airplanes - The revision enhances engine start procedures to prevent avionic system shutdown and undetected turbine temperature exceedance, which could lead to engine failure - Products/Services: - No physical products or services are being procured; the requirement is for a procedural update (TR No. 31) to be incorporated into existing documentation - Unique/Notable Requirements: - Compliance is mandatory for continued airworthiness - The directive is an interim action pending further investigation by the manufacturer - Estimated compliance cost is $85 per airplane - No part numbers, purchase quantities, or vendor competition are involved, as this is a regulatory safety update rather than a procurement action

Description

The FAA is adopting a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. 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. The AD requires incorporating a temporary revision into the existing pilot's operating handbook 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. The AD is effective September 3, 2026.

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