The tug had “several mechanical issues” including brake faillure. It collided into a guardrail 10 days earlier. On this day the employee started to push back an aircraft, but the tug went faster than usual. It veered right. And the 14-ton vehicle crashed near gate 24 and pinned the man between the vehicle and the jetbridge. One 911 call suggested that the vehicle’s accelerator pedal got stuck.
Tug had been “marked out of service numerous times for failed brakes” it reportedly was not serviced and continued to be used. Maintenance of the vehicle is “managed by Menzies Airlines.”