There have been several cases of the landing gear up/down lever getting wired backwards during maintenance. Not to worry, the gear has a 'squat switch' sensor t

There have been several cases of the landing gear up/down lever getting wired backwards during maintenance. Not to worry, the gear has a 'squat switch' sensor that prevents the gear from being raised when the plane is on the ground. Unless you taxi over a bump and the switch decides it's now airborne. Crunch.