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.
Mount Vernon is a city in Davison County, South Dakota, United States. It is part of the Mitchell, South Dakota Micropolitan Statistical Area. The population was 477 at the 2000 census.