Ka 4 Rhönlerche II Zwischenfall während des Trainings auf dem Flugplatz Amlikon mit harter Landung

Am 19. August 1964 endete ein Trainingsflug mit einer Alexander Schleicher Ka 4 Rhönlerche II in einer harten Landung auf dem Flugplatz Amlikon, Schweiz. Das Segelflugzeug drehte während des Endanflugs nach der Erholung aus einem Linksseitengleitflug scharf nach rechts. Der Pilot, ein Schüler, versuchte den Kurs zu korrigieren, verlor jedoch die Kontrolle, was zu einem harten Aufprall auf dem Boden führte. Das Flugzeug erlitt erhebliche Schäden, während der Pilot leichte Verletzungen davontrug. Der Vorfall ereignete sich bei turbulenten Wetterbedingungen während eines Vorflugtrainingskurses.

1. Aerotow landing approach: During an aerotow training flight, the student pilot was on final approach to runway 28, executing a planned left glissade (slip) for landing.
2. Loss of coordination: After recovering from the left glissade at about 30 m AGL and slightly left of the centerline, the student failed to properly coordinate aileron and rudder inputs.
3. Low experience, turbulence: The pilot was a relatively low-time student and the approach sector was known to be turbulent in the prevailing west–southwest wind, potentially complicating control near the ground.
4. Right yaw and sideslip: The glider’s nose yawed sharply to the right while maintaining bank, departing the runway heading at roughly a right angle in a strong sideslip and crossing over the Thur in downwind.
5. Attempted right turn back: Per the investigator’s assessment, the student likely attempted to turn the unintended right yaw into a deliberate right turn to bring the glider back toward the airfield, but did not regain effective control.
6. Unarrested descending turn: The glider continued in a descending right turn with 20–30° nose-down attitude and bank, with no visible flare or reduction of bank before ground contact.
7. Crash - minor injury: Still in a right turn and nose-low attitude, the glider impacted the ground hard near the beginning of the runway, breaking the right wing and deforming the fuselage, and the pilot sustained minor facial injuries.