DAYTON, Ohio—The U.S. Defense Department’s top sustainment official says a $25,000 cost per flight hour target for the Lockheed Martin F-35A remains achievable by 2025. “I’m unwilling to come off the $25,000 cost per flight hour [goal] because no one has showed me that that’s physically impossible to get to,” said Robert McMahon, assistant secretary of defense for sustainment, during an interview on the sidelines of the Air Force’s Life Cycle ...


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