The Learjet 45 was Learjet’s first completely new model, since the Learjet 23. It is larger than the Learjet 31 and smaller than the 60. The cabin is seven feet longer than the 31 and has more head and shoulder room than any other aircraft in its class. The cabin has double club seating, a galley and a full aft lavatory. The cockpit has a Honeywell Primus 1000 integrated avionics suite and the FADEC equipped Honeywell TFE 731-20AR engines was developed in cooperation with Learjet for increased fuel economy and reduced operating and maintenance costs.