Mid-air collision between DG-400 and ASW 19 at Piz Chalchagn, Switzerland

On July 14, 1987, a mid-air collision occurred between two gliders, a DG Flugzeugbau DG-400 and an Alexander Schleicher ASW 19, at Piz Chalchagn in Switzerland. Both aircraft were involved in alpine ridge soaring when the incident took place. Unfortunately, the collision resulted in the fatalities of both pilots. The official report does not specify the cause of the collision. The incident highlights the risks associated with close-proximity flying in mountainous terrain.