Boeing has flown the second 787-9 test aircraft less than two months after the stretched model completed first flight.
The 4h, 18min flight of ZB002 from Everett, Washington, landed at 12:24 at nearby Boeing Field in Seattle.
The second 787-9 is equipped with a full interior and environmental control system.
The first 787-9 has completed 137 flight test hours since first flight on 17 September, Boeing says.
The 290-seat-class aircraft is on track for entry into service with Air New Zealand in mid-2014, Boeing says.