The director of maintenance of a large U.S. charter/management company with experience with HTF7000 turbofans half jokes that, while the engine runs well, you do not want to borescope it.

The turbofan for the USAF Fairchild-Republic T-46 advanced trainer was rated at 1,330 lb. thrust and was assigned the designation F109. But the program was canceled after the first 28 F109s were delivered.

According to Honeywell, there are 700 HTF7000-powered aircraft in service with 1,400 engines that have collectively logged more than 2.6 million hours.