"The plane seems to be coming together real well," Brig. Gen. Charles Davis, the Air Force officer overseeing the program for the government and the military, told the newspaper.
Davis said the goal is to fly the F-35 twice in a 3-day period and then begin regular test flights.
"What I'd be concerned about is if we'd flown at the end of September and then have it sit on the ground for weeks and weeks before we flew it again," he said.
Some 4,000 workers at Lockheed's Forth Worth plant are involved in design, production and development of the F-35 along with 13 design teams from around the world that are working on portions of the aircraft structure, the Star-Telegram said.