Mitsubishi MU-2 Marquise crash, Apr 19, 1993 (8 killed)
Mitsubishi MU-2 Marquise accident on April 19, 1993 near Zwingle, Iowa, United States with 8 fatalities. Cause: Fatigue cracking and fracture of the...
- Date: April 19, 1993
- Aircraft: Mitsubishi MU-2 Marquise
- Location: Zwingle, Iowa, United States
- Fatalities: 8
- Phase of flight: Approach and landing
- Cause: Fatigue cracking and fracture of the propeller hub arm, linked to material and manufacturing factors and to operation at a critical vibration frequency.
A propeller hub arm fatigued and failed in flight at FL240, severing a blade that destroyed the left engine and damaged the cabin. The MU-2 descended in instrument conditions and hit a silo short of Dubuque. All eight aboard died, including South Dakota Governor George Mickelson.