Colisión del ASK 13 con árboles durante la aproximación en el aeródromo de Butzbach

El 23 de julio de 2008, un Alexander Schleicher ASK 13 estuvo involucrado en un accidente en el aeródromo de Butzbach en Alemania. El planeador, en un vuelo de entrenamiento con dos personas a bordo, colisionó con árboles durante la aproximación final. La aeronave volaba inusualmente baja y lenta, lo que resultó en que el ala derecha contactara con los árboles y el planeador se estrellara casi verticalmente. El alumno piloto sufrió heridas graves, mientras que el instructor resultó levemente herido. El planeador fue destruido en el impacto.

1. Circuit training flight: During a winch-launched training flight in the landing circuit, the ASK 13 was flown uneventfully up to the landing pattern.
2. Height misjudged: During the landing pattern the available height was misjudged, resulting in an approach path that was too low over the area before the runway.
3. Low, slow final: On final approach over the trees before runway 29, the glider was observed flying unusually low and at too low an airspeed.
4. Right wing drop: With insufficient airspeed close to the trees, the glider banked to the right and the right wing contacted the treetops.
5. Near-vertical descent: After the wing struck the trees, the glider pitched into a steep, almost vertical descent, being partially decelerated by further contact with branches.
6. Crash - serious injury: The glider impacted the ground almost vertically in the adjacent forest, destroying the aircraft, seriously injuring the student, and slightly injuring the instructor.