777zxBoeing has reactivated its fourth 777X testbed aircraft, desnated WH004, marking its return to flht operations for the first time since late 2021. The aircraft took off from PaineThe basics of the Boeing 777X. For those not familiar, the Boeing 777X is Boeing’s newest version of the 777. It will come in two variants — the 777-8 and 777-9 — and