The Learjet 40 is a shorter cabin version of the Learjet 45. Designed to replace the Learjet 31, the cabin is 4.5 feet longer than the 31 and has more head and shoulder room than the 31, as well. 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 731-20 engine was developed in cooperation with Learjet for increased fuel economy and reduced operating and maintenance costs.
The first flight was on August 31, 2002. Deliveries began in 2004.