The Bell 206 is a family of two-bladed, single and twin-engined helicopters, manufactured by Bell Helicopter. Originally developed as the Bell YOH-4 for the United States Army's Light Observation Helicopter program, it was not selected by the Army. Bell redesigned the airframe and successfully marketed the aircraft commercially as the five-place Bell 206A JetRanger.
Bell also developed a seven-place LongRanger, which was later offered with a twin-engined option as the TwinRanger. The 206L LongRanger is a stretched variant.
In 2007, Bell announced an upgrade program for the 206L-1 and 206L-3 which is designed to modify the aircraft to the 206L-4 configuration. Modifications include strengthened airframe structural components (including a new tailboom), improved transmission, upgraded engine for the L-1, all of which result in increased performance.