Struktureller Ausfall der EoN Olympia 460 während des Flugs in der Nähe von Parham, Sussex, mit Todesfolge

Parham, near Pulborough, Sussex, United Kingdom EoN Olympia 460

Am 2. Juli 1989 erlitt eine EoN Olympia 460 während eines Flugs in der Nähe von Parham, Sussex, einen strukturellen Ausfall, der zum Tod des Piloten führte. Das Segelflugzeug wurde dabei beobachtet, wie es in eine Reihe unkontrollierter Sturzflüge geriet, bevor sich der linke Flügel in geringer Höhe löste. Das Flugzeug wurde beim Aufprall in dichtem Wald zerstört. Untersuchungen ergaben keine Störungen an den Steuerungen und bestätigten, dass der Schwerpunkt innerhalb der Grenzen lag. Das Gurtzeug des Piloten wurde unverschlossen vorgefunden, und Bodentests deuteten darauf hin, dass der Pilot während des Sturzflugs durch das Gurtzeug gerutscht sein könnte.

  1. Cruise thermaling flight: After an aerotow launch at 1145 hrs, the pilot cruised and soared locally for about three hours in good conditions near Parham.
  2. Sudden nose-down pitch: While in a gentle right turn at about 3000 feet agl, the glider abruptly pitched violently nose-down to well past the vertical.
  3. Aft CG and sensitive pitch: The aircraft type was known to be sensitive in pitch, with this flight’s centre of gravity towards the aft limit, increasing susceptibility to pitch disturbances.
  4. Loose harness fit: Post-accident tests in a similar aircraft showed that with the harness adjusted as found, a small pilot could slide through the loose straps in a vertical attitude, forcing the control column forward and losing effective control.
  5. Uncontrolled vertical dives: From around 2000 feet agl the glider remained near-vertical in a high-speed dive, with three brief, unsuccessful pitch-up attempts that did not achieve a sustained recovery.
  6. Left wing structural failure: At an estimated 500 feet agl, during the third brief pitch-up, the left wing suffered a torsional and downward bending overload failure and separated in flight at roughly 600–800 feet.
  7. Crash - fatal: The fuselage and remaining right wing continued almost vertically down and impacted dense woodland, destroying the glider and fatally injuring the pilot.
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