Collision du Ka 8 B lors de l'atterrissage à l'aérodrome de Schänis entraînant des blessures

Le 19 août 1968, un Alexander Schleicher K 8B est entré en collision avec deux planeurs stationnaires lors de l'atterrissage à l'aérodrome de Schänis, en Suisse. Le pilote, tentant d'atterrir sur la piste 35, a mal jugé l'approche et est entré en collision avec un Rhönlerche et un autre Ka 8 B stationnés. Le pilote du K 8B a subi des blessures graves nécessitant un séjour à l'hôpital de cinq semaines. Le K 8B a été fortement endommagé, tandis que le Rhönlerche et l'autre Ka 8 B ont subi des dommages mineurs. L'incident a été attribué à des corrections d'approche incorrectes confirmées dans le rapport d'enquête.

1. Landing approach: After a local soaring flight, the pilot of Ka 8 B HB-679 returned to Schänis and set up a relatively long and high final approach to runway 35.
2. Obstacles on runway: A Ka 8 B (HB-806) was lined up waiting for aerotow near the right edge of runway 35 and a Rhönlerche (HB-586) was parked just beyond the right runway edge with its wing protruding into the airspace at the threshold.
3. Misjudged height after slip: To correct his high approach the pilot performed a slip, then believed he had become too low even though an experienced observer judged his height still adequate.
4. Aimed short landing: The pilot decided to touch down before the runway and extended the airbrakes halfway, committing himself to land on a path leading toward the stationary gliders.
5. Late go-over attempt: Realizing that rollout would collide with the gliders, he retracted the airbrakes and slightly turned right, attempting to float between and above the parked aircraft instead of turning left into the open grass area.
6. Collision with gliders: With insufficient height remaining, HB-679’s right wingtip struck the left wing of the parked Rhönlerche and its left wing rammed the right wing of the waiting Ka 8 B, rotating the latter about 90 degrees.
7. Crash - serious injury: After the collisions HB-679 continued about 30 m, then impacted the ground with about 30° nose-down attitude, rotated roughly 130° with its left wing torn off, resulting in serious injuries to the pilot and heavy damage to the glider.