Cases involving individuals who have been injured in crashes and collisions involving helicopters. A Helicopter Accident is an occurrence associated with the operation of an aircraft which takes place between the time any person boards the helicopter with the intention of flight and all such persons have disembarked, in which a person is fatally or seriously injured, the aircraft sustains damage or structural failure and/or the aircraft is missing or is completely inaccessible.
Ennis is a town in Madison County, Montana, United States, in the southwestern part of the state. The population was 840 at the 2000 census. The elevation of Ennis is 4,941 feet (1,506 m) above sea level. U.S. Route 287 runs through town, following the Madison River as it descends from West Yellowstone. Just downstream from town is Ennis Lake, formed by the Madison Dam.