Boeing to reveal 777X test plane on March 13 March, 2019 | Americas, Technology | 0 | Boeing has indicated on a Twitter post that it will debut its very first 777X flight test airplane.This content is restricted to site members. If you are an existing user, please login below. New users may register below.Existing Users Log InUsername or EmailPassword Remember Me Forgot password? Click here to resetNew User? Click here to register