Pratt & Whitney has achieved Transport Canada type certification of its first ‘PurePower’ geared turbofan engine. The PW1500G, which will power Bombardier’s CSeries aircraft, has undergone 4,000 hours of testing since initial tests began in September 2010. The engine’s test programme included 340 hours of flight testing on P&W’s experimental 747 flight test aircraft. The PW1500G engines are assembled at P&W’s Canada’s Mirabel Aerospace Centre in Mirabel, Quebec. The engine uses an advanced gear system that allows the engine's fan to operate at a different speed than the low-pressure compressor and turbine and aims to improve fuel efficiency, environmental emissions, and noise.