Federal Register #2026-06506

FAA Directive: Bombardier Challenger 600 Series Setscrew Replacement and Maintenance Program Update

This opportunity involves a new FAA airworthiness directive (AD) for Bombardier Challenger 600 series aircraft to address a critical safety issue: - Government Buyer: - Federal Aviation Administration (FAA), Department of Transportation - Aircraft Certification Service, Compliance & Airworthiness Division - OEM Highlight: - Bombardier Inc. is the sole OEM for all affected aircraft and parts - Products/Services Requested: - Replacement of nosewheel steering rudder pedal potentiometer universal coupling setscrews with new self-locking setscrews - Applies to 930 U.S.-registered Bombardier Challenger 600, 601, 604, 605, and 650 aircraft - Includes application of anaerobic retaining compound, specified torque, and potentiometer rigging - All procedures and materials must follow Bombardier service bulletins and technical documentation - Revision of maintenance or inspection programs to incorporate new life limits for the setscrews - References Bombardier Challenger Temporary Life Maintenance Check (TLMC) Temporary Revisions and Service Bulletins - Unique/Notable Requirements: - Compliance required within 36 months or 1,400 flight hours for setscrew replacement, and within 60 days for maintenance program revision - Ongoing maintenance intervals and life limits must be tracked per Bombardier documentation - All affected aircraft must use Bombardier-approved parts and procedures - Locations: - FAA Airworthiness Products Section, Operational Safety Branch, Des Moines, WA (government facility) - FAA Office, Westbury, NY (government facility) - Bombardier Business Aircraft Customer Response Center, Dorval, Quebec, Canada (OEM contact) - Scope: - Affects all U.S.-registered Bombardier Challenger 600 series aircraft (930 units) - No alternative OEMs or products specified; Bombardier is the only approved source

Description

The FAA is issuing a new airworthiness directive (AD) for all Bombardier Inc. Model CL-600-1A11, CL-600-2A12, and CL-600-2B16 airplanes. This AD addresses an unsafe condition caused by uncommanded nose wheel steering upon landing due to loose nosewheel steering rudder pedal potentiometer universal coupling setscrews. The directive requires replacing these setscrews with new self-locking setscrews and revising the maintenance or inspection programs to include new life limits for the setscrews. The AD aims to prevent runway excursions and is effective May 8, 2026.

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