FedEx Corp. announced Tuesday that it has cancelled its order for 10 Airbus A380 jets due to the continuous delays in its production.The company’s FedEx Express unit has now ordered 15 Boeing 777 Freighter aircraft with an option to purchase an additional 15 planes. The company is expected to take delivery of four of the 777 aircraft in 2009, eight in 2010 and the remaining three in 2011. FedEx Express continues to be Airbus' largest wide-body airplane customer. Six new A300-600 aircraft are scheduled to be added to the FedEx fleet in 2007. The Boeing 777 Freighter is the world’s largest twin-engine cargo aircraft with a range of more than 6,100 nautical miles and a revenue payload capacity of 171,000 pounds.