Garrett TFE731

The TFE731 is a family of geared turbofan engines used mainly on business jets. Garrett AiResearch designed and built it, and through later mergers it came to be produced by AlliedSignal and then Honeywell Aerospace. It was based on the core of the TSCP700, an auxiliary power unit developed for the McDonnell Douglas DC-10, and was designed for low fuel consumption and low noise to meet newly established United States noise rules. The first test run took place in 1970 at Garrett's plant in Torrance, California, and the first production model, the TFE731-2, came off the line in August 1972 for the Learjet 35/36 and the Dassault Falcon 10. More than 11,000 engines have been built, flying over 100 million flight hours. Variants run from the -2 to the -60 and -1100, and the fan is driven through a gearbox ahead of a five-stage compressor of four axial stages and one centrifugal stage.