Accident to the GROB G103 TWIN ASTIR registered F-CFKS on 19/07/2020 at Saint-Doulchard
Incapacité en vol, perte de contrôle et évolutions inusuelles, collision avec la végétation puis le sol
The glider pilot carried out a towed take-off from Bourges airport to perform a local flight, during which he flew more than two hours above an altitude of 2,000 m. After 2 h and 40 min of flight, the pilot most probably suffered an incapacitation preventing him from flying the glider. The latter then entered a natural mode of divergent longitudinal oscillations. For about seven minutes, while it was gradually descending, the glider oscillated with increasingly greater variations of altitude and speed, leading to unusual manoeuvres with incomplete egg-shaped loops which may have ended in stalls at their highest point. The glider collided at high speed with a line of trees, then with the ground.