Continental Airlines, was the first commercial airline to test a 50:50 blend of bio-derived “green jet” fuel and traditional jet fuel in the first demonstration of the use of sustainable biofuel to power a commercial aircraft in North America.( January 2009). The demonstration flight, conducted in partnership with Boeing, GE Aviation/CFM International, and Honeywell’s UOP, marked the first sustainable biofuel demonstration flight by a commercial carrier using a two-engine aircraft: a Boeing 737-800 equipped with CFM International CFM56-7B engines. Continental ran the blend in Engine No. 2. During the two-hour test flight, Continental pilots engaged the aircraft in a number of normal and non-normal flight maneuvers, such as mid-flight engine shutdown and restart, and power accelerations and decelerations. A Continental engineer recorded flight data on board. KLM, the Royal Dutch Airline, was the first airline to operate a passenger-carrying flight using biofuel. On 23 November 2009, a Boeing 747 flew, carrying a limited number of passengers, with one of its four engines running on a 50/50 mix of biofuel and kerosene.