Rockwell Grand Commander 690 crash, May 27, 1978 (2 killed)
Rockwell Grand Commander 690 accident on May 27, 1978 near Calumet Oklahoma, United States with 2 fatalities.
- Date: May 27, 1978
- Aircraft: Rockwell Grand Commander 690
- Location: Calumet Oklahoma, United States
- Fatalities: 2
- Phase of flight: En route
Rockwell Grand Commander 690 N299F, operated by International Crystal Manufacturing Company, was on a business flight from Oklahoma City to Colorado Springs. A few minutes after takeoff the crew encountered thunderstorm activity and severe turbulence, and the aircraft broke up in flight and crashed at Calumet. Both occupants were killed and the aircraft was destroyed.