ASW 19B atterrissage dur après accrochage de câble à Samedan
Le 21 mai 1988, un Alexander Schleicher ASW 19B a subi un atterrissage dur à l'aéroport de Samedan lors d'un lancement par treuil. Un deuxième câble de treuil s'est emmêlé avec la roulette de queue du planeur, affectant sa performance de montée. Le pilote a libéré le câble de lancement à environ 140 mètres d'altitude, mais le planeur était difficile à contrôler en raison du parachute ouvert du deuxième câble. L'appareil a atterri durement à côté de la piste, entraînant des dommages importants, mais le pilote n'a pas été blessé. L'enquête a souligné un espacement insuffisant entre les câbles de treuil et une mauvaise organisation au sol comme facteurs contributifs.
- Winch launch takeoff: The pilot began a winch launch in ASW 19B HB-1856 from runway 03 at Samedan for a local soaring flight.
- Second cable snags tail: During the initial climb, the parallel second winch cable, with its parachute still attached, became caught on the glider’s tail skid.
- Insufficient cable spacing: The second winch cable had been laid out only about 2.5 m from the launch cable and not moved farther away when the first cable was attached to the glider.
- Poor ground organization: Ground personnel left the second cable’s parachute attached and allowed people to remain near the second cable, indicating inadequate awareness and organization of winch launch hazards.
- Pilot releases launch cable: Noticing poor climb performance, the pilot released the primary launch cable at about 140 m above ground.
- Control severely limited: With the second cable’s open parachute trailing, the glider’s controllability was greatly reduced due to the stabilizing and drag effects.
- Hard landing - damage: The glider impacted the ground hard to the right of runway 03, sustaining severe damage while the pilot remained uninjured.