United States, April 21 -- Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a not-to-exceed $180,000,000 undefinitized cost modification (P00012) to a previously awarded contract (N0001923C0003). This modification adds scope to procure materials, parts, and components in support of the conversion of three production F-35 aircraft to flight science replacement aircraft. The new flight science aircraft are required to prevent any increase in the test capability gap, and allow for future, holistic flight science testing of block four capabilities for the Air Force, Marine Corps, Navy, non-U.S. Department of Defense (DOD) program partners, and Foreign Military Sales customer. Work will be performed in Fort W...