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.
Viola is an unincorporated community in eastern Linn County, Iowa, United States. It lies along local roads northeast of the city of Cedar Rapids, the county seat of Linn County. Its elevation is 978 feet (298 m), and it is located at 42°5′27″N 91°26′16″W / 42.09083°N 91.43778°W / 42.09083; -91.43778 (42.0908332, -91.4376685). Although Viola is unincorporated, it has a post office, with the ZIP code of 52350, which opened on 7 October 1861.