HAWK21M: You mean like a brake release for the Aileron & Elevator.
Not really. I can only speak for the ERJ-145 as that is what I fly, but I imagine the system is very similar. The control yokes are connected by a torque tube under the floor. The torque tube is what moves the cables. There are two sets of cables that go to the control surfaces. They take different routes in order to get there. Let's say that one of the cables becomes locked up for some reason, by pulling the red handle for the affected flight control, you break the connection between the left and right side of the torque tube, meaning that one of the pilots still has the ability to move the flight control (the two cables are connected on opposite sides of the torque tube), while the other one will still be stuck. It has no use as a gust lock, if that's what you're thinking it might do. ie. these handles would only ever be pulled in an emergency flight control malfunction situation. Hope this helps
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