Honeywell presented the 10,000th TFE731 turbofan, a -20AR, to Bombardier for installation on a Lear 45. The TFE731 was the first high-bypass fuel efficient engine for business aircraft that was not a derivative of an older military engine. It was the first production propulsion engine to use an electronic engine control. 99 percent of all TFE731 engines are still in service with nearly 49 million hours of operation worldwide, Honeywell says.