Bombardier planes must disconnect a system that can cause uncommanded flap movement

The US aviation regulator is ordering all Bombardier CL-600-2B16 (604 Variant) airplanes to disconnect a specific system. This system, which records flap data, can interfere with the flap controls and cause unexpected flap movements.

This is a safety fix for a specific aircraft model. The issue is that a data recorder, meant to monitor the flap system, was actually causing problems with it. This kind of unexpected interaction between monitoring systems and core flight controls is a recurring concern in complex aircraft.