A critical mount that kept the left engine attached to the UPS flight that crashed in Louisville earlier this month failed only moments after the doomed flight broke ground, according to a new report from the National Transportation Safety Board The report includes stunning frame-by-frame photos of the left engine of three-engined McDonnell Douglas MD-11F separating from the plane and going up and over the wing and igniting a fireball seen in a sequence of six extraordinary new images obtained by investigators.