The American Airlines fleet is the largest in the world, comprising 921 mainline aircraft from both Boeing and Airbus. American Airlines is currently in the process of the largest fleet renewal in its history, with an additional 159 aircraft on order from Airbus and Boeing. American's wide-body aircraft are all Boeing airliners. It is the third-largest operator of the Boeing 787 series and the sixth-largest operator of the Boeing 777 series.