The sixth and final Boeing 787 Dreamliner designated for flight test is now undergoing final assembly in Everett, Washington, the airframe manufacturer said this week. It said progress continues on the fleet with the first flight test airplane, ZA001, getting its paint touched up this week before finishing factory testing. Power was brought onto the second airplane, ZA002, in late February and build verification tests are progressing well. Production work continues on ZA003, ZA004 and ZA005. In all, assemblies for 31 Dreamliners are currently in production throughout the supply chain. The 787 Dreamliner has orders for 878 airplanes from 57 customers.