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.
Allen is a city in Collin County, Texas, United States, and a wealthy northern suburb of Dallas. As of the 2000 census, the city had a total population of 43,554. As of 2007, the city's population is estimated at 77,644.