Leistungsverlust beim Start des Grob G109 in Moreton-in-Marsh führt zu Grabenaufprall

Moreton-in-Marsh, Gloucestershire, United Kingdom Grob G109

Am 6. April 1986 erlitt ein Grob G109 Eigenstart-Motorsegelflugzeug während des Starts in Moreton-in-Marsh, Gloucestershire, einen Leistungsverlust. Das Flugzeug befand sich auf einem Trainingsflug und war zuvor wegen eines Sturms gelandet. Beim Startversuch von der nassen Graslandebahn ließ die Motorleistung plötzlich nach, wodurch das Segelflugzeug wieder auf die Startbahn sank. Der Pilot versuchte, einen Graben am Ende der Startbahn zu überqueren, aber der rechte Flügel senkte sich, was zum Einknicken des Fahrwerks beim Aufprall führte. Beide Insassen blieben unverletzt, aber das Flugzeug wurde erheblich beschädigt. Die Ursache des Leistungsverlusts konnte nicht festgestellt werden, jedoch wurde Vergaservereisung vermutet.

  1. Self-launch takeoff roll: During a self-launch takeoff from the 500-yard wet grass strip, the Grob G109 accelerated normally and became airborne at about 45 kt, well before the predetermined abandon point.
  2. Sudden power loss: While the aircraft was held level to build speed to the 52 kt climb-out value, the engine speed suddenly reduced, causing a significant loss of power.
  3. Attempt to clear ditch: With insufficient runway remaining to stop and seeing a wide ditch at the end of the strip, the pilot attempted to fly across it using the limited remaining engine power.
  4. Wing drop and impact: As the aircraft just became airborne again, the right wing began to drop and the right undercarriage struck the far side of the ditch, collapsing the fixed gear.
  5. Crash - no injury: The aircraft sank to the ground, slewed to the right, and came to rest in the field with substantial structural damage but no injuries to the two occupants.
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