Colisión de un ASK 13 con una persona durante el aterrizaje en el aeródromo de Grenchen

El 21 de agosto de 1981, un planeador Alexander Schleicher ASK 13 colisionó con una persona durante el aterrizaje en el aeródromo de Grenchen, Suiza. El piloto estudiante estaba realizando su segundo vuelo en solitario y se aproximaba a la pista de aterrizaje marcada en amarillo. Durante el aterrizaje, el ala izquierda del planeador golpeó a una de las tres personas que estaban en la pista, causando lesiones en la cabeza. La colisión ocurrió porque la persona permaneció innecesariamente en la pista. El planeador sufrió daños en su ala izquierda, pero no hubo víctimas mortales.

1. Aerotow landing: During his second solo flight after an aerotow launch, the student pilot flew a normal circuit and turned onto final approach to land on the yellow-marked glider landing strip.
2. People on landing strip: On final approach the student pilot observed a group of three glider students standing on the yellow landing strip in his intended touchdown area.
3. Obstructed adjacent strips: The pilot assessed that lateral deviation was inadvisable because a towplane was on the red takeoff strip to his left and another glider landing had been announced on the blue strip to his right.
4. Person remains on strip: Despite the approaching glider, one of the students (Y) remained standing unnecessarily within the yellow landing strip near its left edge instead of moving clear.
5. Approach continued: Expecting the group to vacate the runway or that he could pass by them, the student pilot continued a normal, straight-in landing on the yellow strip without a late avoidance maneuver.
6. Wing strikes person: At touchdown about 42.5 m beyond the threshold and slightly south of the centerline, the glider’s left wingtip area struck student Y in the head as he stood near the left side of the yellow strip.
7. Crash - serious injury: The glider veered left and stopped south of the yellow strip with damage to its left wing, and student Y sustained head injuries from the wing impact.