Collision d'un DG 500 Elan-Trainer avec un hangar lors d'un vol d'entraînement à l'aérodrome de Montricher

Montricher, Switzerland DG Flugzeugbau DG-500 Elan Trainer

Le 20 août 1997, un DG Flugzeugbau DG-500 Elan Trainer est entré en collision avec un hangar lors d'un vol d'entraînement à l'aérodrome de Montricher, en Suisse. L'incident s'est produit peu après le décollage lorsque le câble de remorquage a été libéré par inadvertance à basse altitude. L'appareil a dévié vers la droite et s'est écrasé contre un hangar, entraînant la mort de l'élève-pilote et des blessures graves pour l'instructeur. Le planeur a été fortement endommagé, et le hangar, ainsi qu'un autre planeur et une aile delta stockés à l'intérieur, ont subi des dommages. Les conditions météorologiques n'ont pas été un facteur dans l'accident.

  1. Aerotow takeoff: The DG-500 began a normal aerotow departure from runway 03 with instructor in the rear seat and student in the front seat.
  2. Premature cable release: At about 30 m above ground, the tow cable was unintentionally released by the student, most likely due to confusing the release handle with the rudder pedal adjustment control.
  3. Insufficient altitude: The glider was at only around 30 m AGL, well below the minimum safe height needed to turn back or maneuver with margin after an unexpected tow release.
  4. Instructor takes control: Immediately after the release, the instructor announced he was taking control (“my control” / “ich flüge”) intending to continue straight ahead toward a suitable landing area.
  5. Student initiates right turn: Within a few seconds of the release, the glider entered a steep, nose‑up right turn toward the wooded area and hangars, attributed to an abrupt control input by the student despite the instructor’s takeover.
  6. Low, slow steep turn: The glider climbed slightly in the steep right turn over the trees, lost speed, and reached a nose‑up, highly banked attitude from which it could not be recovered at the remaining low height.
  7. Crash - fatal: After completing a little more than half a turn back toward the airfield, the glider struck a hangar, fatally injuring the unrestrained student, seriously injuring the instructor, and heavily damaging the aircraft and the building.
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