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FAA Proposes AD for Challenger 600-Series Flap Malfunction Risk

May 26, 2026

1 min read

Key Takeaways

FAA proposes AD for 610 US-registered Challenger 600-series aircraft.
Proposed AD addresses in-flight flap malfunction risk.
Affected models include Challenger 600, 601, 601-3A, 601-3R, and 604 variants.
Estimated cost per aircraft is $85.

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Strategic Implications

This proposal may indicate the FAA's heightened focus on addressing potential safety risks in business aviation. The requirement for operators to revise the aircraft flight manual suggests a proactive approach to mitigating the risk of loss of control, which could enhance safety standards across the industry.

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What Happened

US Regulator Targets Potential Loss of Handling in Business Jets

The Federal Aviation Administration (FAA) has proposed a new airworthiness directive for 610 US-registered Bombardier Challenger 600-series aircraft due to concerns about the potential for dangerous loss of handling in the business jet. The proposed AD follows an in-flight event in which a CL-600-2B16 experienced uncommanded and unarrested flap movement. The FAA estimates the action would cost $85 per aircraft, or $51,850 across the affected US fleet. The proposal was reported by AeroTime.

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