Boeing has turned on the electrically powered systems in the prototype 777-9 for the first time at its Everett, Washington, facility, setting the clock ticking toward flight tests of the initial variant of the company’s new long-range 777X flagship starting in early 2019.   The “power on” milestone, staged over successive days at the end of November, comes less than two weeks after the first flight aircraft completed final body join and marks a critical test for the ...


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