Honeywell/ITEC F124

F124 / F125
Honeywell F124 cutaway
Type	Turbofan
National origin	United States / Taiwan (Republic of China)
Manufacturer	International Turbine Engine Corporation / Honeywell
First run	1979 [1]
Major applications	Aermacchi M-346 Aero L-159 Alca AIDC F-CK-1 Ching-kuo AIDC T-5 Brave Eagle
Number built	460 (by 2004) [1]
Developed from	Honeywell TFE731

The Honeywell/ITEC F124 is a low-bypass turbofan engine derived from the civilian Honeywell TFE731. The F125 is an afterburning version of the engine. The engine began development in the late 1970s for the Republic of China (Taiwan) Air Force AIDC F-CK Indigenous Defence Fighter (IDF), and it first ran in 1979. The F124/F125 engine has since been proposed for use on other aircraft, such as the T-45 Goshawk and the SEPECAT Jaguar, and currently powers the Aero L-159 Alca and the Alenia Aermacchi M-346. The F124 has a rather unusual design for a two spool gas turbine engine, using both axial and centrifugal compressors in its high-pressure compressor. There are currently only three production variants of the engine, although several more have been proposed throughout its lifespan.