The
General Electric T58 is an American
turboshaft engine developed for helicopter use. First run in 1955, it remained in production until 1984, by which time some 6,300 units had been built. On July 1, 1959, it became the first turbine engine to gain FAA certification for civil helicopter use. The engine was license-built and further developed by
de Havilland in the UK as the
Gnome, and also manufactured by
Alfa Romeo and the
IHI Corporation.