Boeing plans first flight of production 777X in April

Boeing plans the first flight of a production 777X in April, a company document seen by Reuters shows, an important signal of progress for the planemaker's long-delayed new jet, which is slated for first delivery next year.
The company is conducting fuel tests on the 777X ordered by Lufthansa at Paine Field in Everett, Washington, where it assembles the mini-jumbo, ahead of engine tests later this month, according to the document.