Boeing has resumed 777X testing as the second aircraft readies for its first flight. The first 777X, N777XW, started flying this week and has completed four flights, while the second, N777XX, WH002, did a preflight taxi run yesterday. The first 777X has now completed 29 flights in total. Seattle photographer Royal King captured N777XX yesterday. Here is a video of WH001 flight on April 26 taken by @peyton_ramirez19 (Instagram) https://twitter.com/i/status/1254260170642690048