Within seconds, the left engine failed and the pilots began preparing for a single-engine landing. As they communicated their intentions to controllers in Winnipeg and tried to restart the left engine, the cockpit warning system sounded again with the "all engines out" sound, a sharp "bong" that no one in the cockpit could recall having heard before. Seconds later, the right-side engine also stopped and the 767 lost all power. Flying with all engines out was something that was never expected to occur, so it had never been covered in training.