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.
Clifton Heights is a borough in Delaware County, Pennsylvania, six miles (10 km) west of downtown Philadelphia and on Darby Creek. The population was at 2,330 in 1900, and 3,155 in 1910. The population was 6,779 at the 2000 census.