The airplane departed London on a flight to Kuwait City with an intermediate stop in Athens. While cruising vertical to Montélimar, the crew encountered poor weather conditions with thunderstorm activity and turbulences. Control was lost and the airplane entered a dive before crashing on a hill located near Saint-Vincent-de-Barrès, about 12 km northwest of Montélimar. Debris were found on a wide area and all eight occupants were killed.
Probable cause (official findings): It is believed that the loss of control was the consequence of in-flight turbulences while cruising in a thunderstorm area. The assumption that the aircraft may have been struck by lightning was not ruled out. Severe turbulences also may cause the aircraft to suffer a structural failure.