Federal Register #2026-08022

FAA Mandates Pilatus PC-12/47G Brake Pipe Assembly Replacement

The Federal Aviation Administration (FAA), part of the Department of Transportation, is mandating a safety upgrade for Pilatus PC-12/47G aircraft due to a brake shuttle valve malfunction risk. - Government Buyer: - Department of Transportation, Federal Aviation Administration (FAA), Aircraft Certification Service, International Validation Branch - OEMs and Vendors: - Pilatus Aircraft Ltd. (OEM for PC-12/47G aircraft and brake assemblies) - Products/Services Requested: - Replacement of left-hand (LH) and right-hand (RH) brake pipe assemblies on Pilatus PC-12/47G airplanes - Applies to 13 U.S.-registered aircraft - No specific part numbers provided - Estimated cost: $5,255 per aircraft (parts and labor) - Unique/Notable Requirements: - Prohibits installation of affected brake pipe assemblies to prevent asymmetric wheel braking and loss of directional control - Compliance procedures reference EASA Emergency AD 20260065E - Directive issued to address an unsafe condition and ensure continued airworthiness - Locations: - FAA Aircraft Certification Service, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590 - FAA Airworthiness Products Section, 901 Locust, Kansas City, MO 64106 - U.S. Department of Transportation Docket Operations, 1200 New Jersey Avenue SE, Washington, DC 20590

Description

The FAA is adopting a new airworthiness directive (AD) for certain Pilatus Model PC-12/47G airplanes, effective May 11, 2026, to address brake system issues. This AD was prompted by a report that a brake shuttle valve (BSV) on a production airplane shuttled and isolated the brake line to the left-hand (LH) brake, resulting in brake lockup. The AD requires replacement of the LH and right-hand (RH) brake pipe assemblies and prohibits installation of affected parts to prevent unintended asymmetric wheel braking and reduced directional control of the airplane. The FAA invites comments on this AD by June 8, 2026.

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