Scandinavian Airlines Flight 751 is mired in snow and slush at Stockholm airport. The DC-9 is de-iced twice to ensure it's safe for take-off. Despite the winter conditions, the aircraft takes off smoothly. But within seconds, the engines begin emitting a series of rapid-fire booming noises, smoke begins filtering through the cabin, and less than two minutes later, both engines fail.Scandinavian Airlines Flight 751 is mired in snow and slush at Stockholm airport. The DC-9 is de-iced twice to ensure it's safe for take-off. Despite the winter conditions, the aircraft takes off smoothly. But within seconds, the engines begin emitting a series of rapid-fire booming noises, smoke begins filtering through the cabin, and less than two minutes later, both engines fail.