The GE9X engine lifted off on March 13 under wing of GE Aviation’s 747 flying testbed in Victorville, California, for its first flight test | Aviation Tv

794K views · 12K reactions | Confirming that after years of design and testing, it’s almost time for the #777X to fly. The airplane will make its first flight as early as January 23, subject to weather and other factors. Take a look at what defines the 777X. | The Boeing Company | Facebook

The second of four Boeing #777X test airplanes took to the skies for the first time yesterday. The jet will now start testing handling characteristics as part of our rigorous test program. | The Boeing Company

Our first #777X flight test airplane made its runway debut! Our teams performed a series of low-speed taxi tests, marking the first time this plane moved on its own power. This is one of many tests before the 777X takes to the skies later this year. | The Boeing Company