Lockheed Martin Corp., Lockheed Martin Aeronautics Co., Fort Worth, Texas, is awarded a not-to-exceed $194,704,140 undefinitized contract modification (P00039) to a previously awarded cost-plus-incentive-fee contract (N0001919C0010). This modification adds scope to provide non-recurring engineering, integration and testing of the aircraft interface module in support of ASQ-239 electronic warfare/countermeasures system upgrades planned for F-35 Lot 17 aircraft deliveries for the Navy, Marine Corps, Air Force, and non-Department of Defense participants. Work will be performed in Nashua, New Hampshire (75%); and Fort Worth, Texas (25%), and is expected to be completed in April 2024. Fiscal 2021 research, development, test and evaluation (Air Force) funds in the amount of $3,500,000; and fiscal 2021 research, development, test and evaluation (Navy) funds in the amount of $3,500,000 will be obligated at time of award, none of which will expire at the end of the current fiscal year. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.