From the world renown Wikipedia which as any Liberal will tell you is an absolutely accurate reference source.....
Early 2006A V-22 experienced an uncommanded engine acceleration while ground turning at Marine Corps Air Station New River. Since the aircraft regulates power turbine speed with blade pitch, the reaction caused the aircraft to go airborne with the Torque Control Lever (TCL, or throttle) at idle. The aircraft rose 6 feet (1.8 m) into the air, and then fell to the ground with enough force to damage one of its wings; the total amount of damage was around US$ 1,000,000. It was later found that a miswired cannon plug to one of the engine's two Full Authority Digital Engine Controls (FADEC) was the cause. The FADEC software was also modified to decrease the amount of time needed for the switch between the redundant FADECs to eliminate the possibility of a similar mishap occurring in the future.[12]