How Often Have Boeing's 4 Test 777Xs Flown This Year?

777zxThe 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 — andBoeing in recent weeks removed orders for 38 of its in-development 777X from its backlog, placing the deals into a special accounting bucket reserved for orders it suspects