EVERETT, Wash. (AP) -- Boeing Co. says the sixth and final 787 flight test plane is undergoing final assembly at the factory in Everett.
The company says tests are progressing well and assemblies for 31 of the new planes are in the supply chain.
The 787 is nearly two years behind its original schedule.
Boeing has said the fuel-efficient widebody will make its first flight around the middle of this year. The first delivery is scheduled for early next year.
Boeing has orders for 878 of the planes from 57 customers.