Mitsubishi MU-2 Marquise crash, Sep 3, 1994 (1 killed), U...
Mitsubishi MU-2 Marquise accident on September 3, 1994 near Urnäsch, Appenzell Ausserrhoden, Switzerland with 1 fatality. Cause: Malfunction of the...
- Date: September 3, 1994
- Aircraft: Mitsubishi MU-2 Marquise
- Location: Urnäsch, Appenzell Ausserrhoden, Switzerland
- Fatalities: 1
- Phase of flight: En route
- Cause: Malfunction of the negative torque system on the right engine, combined with continued flight despite that malfunction and asymmetric thrust from a windmilling propeller, according to investigation summaries.
A Mitsubishi MU-2 test flight from Zurich, made after propeller changes at Basel, was meant to check the propellers and the negative torque system. The pilot shut down the right engine twice, and after the second shutdown the propeller windmilled and produced extreme asymmetric thrust. The aircraft descended steeply and crashed in woodland near Urnasch, burning and killing the sole pilot.