Pratt & Whitney and Russia's Irkut Corp. signed a definitive agreement to offer the P&W PurePower PW1400G engine on Irkut's MC-21 family of aircraft. This agreement makes the PurePower engine the only western powerplant offered on the new narrow-body program. P&W and Irkut selected Short Brothers plc, a subsidiary of Bombardier Aerospace, as the exclusive nacelle provider for the PW1400G engine family. Irkut is developing the MC-21 as a family of 150- to 210-passenger aircraft with first flight of the PurePower PW1400G engined aircraft planned for 2015 and entry into service in 2017. The MC-21 series will feature on aircraft with 25,000-32,000 lb of thrust. The PurePower PW1000G series engines use an advanced gear system allowing the engine's fan to operate at a different speed than the low-pressure compressor and turbine.