Mucha 100 A accident during takeoff at Gruyères Aérodrome resulting in aircraft destruction

On August 13, 1975, a Mucha 100 A experienced a loss of control during the takeoff roll at Gruyères Aérodrome, Switzerland. The glider, operated by Aéro-Gruyère Société d’aviation sportive, was destroyed when it overturned after veering off the runway. The pilot, who was uninjured, managed to exit the aircraft without assistance. The investigation confirmed that an omission in pre-flight checks led to the improper assembly of the right wing, contributing to the accident.