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.
Lewisville is a city in Denton County, Texas in the U.S. state of Texas. As of the 2000 census the city had a total population of 77,737. With strong population growth continuing into the new millennium, the U.S. Census Bureau gives a 2008 population estimate of 101,624. Lewisville is one of the oldest incorporated cities (incorporated in 1925) in the northern area of the Dallas-Fort Worth Metroplex, but it remained a small rural town with just a few thousand people as late as the early 1970s.