On 30 June 1994, a fatal crash occurred during certification of the Pratt & Whitney engine when an A330 crashed near Toulouse. Both pilots and the five passengers died. The flight was designed to test autopilot response during a one-engine-off worst-case scenario with the centre of gravity near its aft limit. Shortly after takeoff, the pilots had difficulty setting the autopilot, and the aircraft lost speed and crashed. An investigation by an internal branch of "Direction Generale d'Aviation" concluded that the accident resulted from slow response and incorrect actions by the crew during the recovery. This led to a revision of A330 operating procedures.