1979 Piper PA-34-200 Emergency Landing near Dompierre (HB-LEP)

Flight and Accident Overview On Easter Monday, 16 April 1979, a Piper PA-34-200 registered HB-LEP, operated by Flugschule Basel AG, made an emergency landing near Dompierre in the canton of Fribourg, Switzerland. The aircraft was destroyed, but the pilot and three passengers were not injured. ## Flight Progression The flight originated in Cannes, France, with a stop in Marseille. After a meteorological briefing in Marseille, the pilot was advised to avoid the Swiss plateau due to precipitation and thunderstorms and instead route via Lyon, the Doubs valley, and the Burgundy gap. The aircraft departed Marseille at 16:40 local time. ## Loss of Orientation North of Lyon, the pilot encountered precipitation and made significant course changes near Mâcon to avoid thunderstorms. The pilot also used instrument flight techniques for which he was not yet fully trained, leading to a loss of geographic orientation. The pilot crossed the Jura mountains without realizing it. ## Communication and Emergency Landing The pilot attempted to contact Basel air traffic control but did not receive the requested radar assistance from Zürich. After spotting a lit factory, the pilot circled for approximately 15 minutes before deciding to make an emergency landing on a nearby field. The landing occurred at 19:15 local time. The aircraft overran the end of the approximately 200-meter field and came to rest in an adjacent field with the nose gear broken off. ## Contributing Factors The investigation identified the loss of orientation as the primary cause, resulting from continuing a visual flight rules flight in conditions that required partial instrument flight, and insufficient flight preparation. Contributing factors included minimal separation and the pilot's limited experience on the accident aircraft type.