The Beechcraft T-34 Mentor is a propeller-driven, single-engined, military trainer aircraft derived from the Beechcraft Model 35 Bonanza. The earlier versions of the T-34, dating from around the late 1940s to the 1950s, were piston-engined. These were eventually succeeded by the upgraded T-34C Turbo Mentor, powered by a turboprop engine. The T-34 remains in service almost six decades after it was first designed.
After a production hiatus of almost 15 years, the T-34C Turbine Mentor powered by a Pratt & Whitney Canada PT6A-25 turboprop engine was developed in 1973