De Havilland DHC-6 Twin Otter crash, Jun 18, 1986 (20 killed)
De Havilland DHC-6 Twin Otter accident on June 18, 1986 near Grand Canyon, Arizona, United States with 20 fatalities. Cause: NTSB cited the route...
- Date: June 18, 1986
- Aircraft: De Havilland DHC-6 Twin Otter
- Location: Grand Canyon, Arizona, United States
- Fatalities: 20
- Phase of flight: En route
- Cause: NTSB cited the route configuration of helicopter tour operators, which intersected Grand Canyon Airlines routes near Crystal Rapids
Grand Canyon Airlines Flight 6, a DHC-6 Twin Otter, collided with a Helitech Bell 206 helicopter over Grand Canyon National Park on 18 June 1986. All 20 aboard the Twin Otter were killed, as were the five helicopter occupants, and the Twin Otter was destroyed after the rotor severed its nose gear and the tail separated.