"In the frame-by-frame photos from the surveillance video, the left engine can be seen rotating upward from the wing, and as it detaches from the wing, a fire ignites that engulfs both the departing engine/pylon and the area of the wing where the engine was attached." Source: Just part of the details that were revealed in a recent update from the NTSB, following the tragic Lousville UPS MD-11 accident.