The most extensive over-ride capability is provided by the Embraer EMB-145, where a single push button on the yoke disables or disengages the stick pusher, the auto-pilot, and the elevator trim system. The Canadair CRJ has a toggle switch next to the captains knee that can be used to deselect the stick pusher. Since the pilot has the ultimate responsibility for the safe conduct of the flight, the ability to over-ride a malfunctioning system is of utmost importance
ALPA
The answer is to give the pilot(s) a quick means of disabling all alarms so that they can restore calm
in the cockpit and fly the plane.If an anti-stall device is actually going to independently operate flight controls (primary or auxiliary),as in the case of this MCAS,then they have to go back to the drawing board and look again at how to prevent false ADIRU data triggering these devices(no easy task obviously).It is one thing to get a false stick shaker.It is entirely another thing to get the FCC commanding operation of flight controls based on false data.
Over and out.