EVERETT, WA—Boeing will shut down a temporary extra assembly line used to build 787 Dreamliners at the end of this year and convert it for use in early production of the forthcoming 777X jet. Two final assembly lines in Everett are currently producing seven 787s per month. Workers on the temporary line, known as the “surge line,” will transition to the other assembly line, which will step up production to match the rate from both assembly lines. MORE