The Boeing Co., Oklahoma City, Oklahoma, has been awarded an estimated amount of $14,446,683, Option Three modification (P00013) to contract FA8105-16-D-0002 for KC-135 engineering services for sustainment. The contract modification provides for recurring engineering services for sustainment of the KC-135 aircraft. Work will be performed in Oklahoma City, Oklahoma; San Antonio, Texas; Huntsville, Alabama; and Fort Walton Beach, Florida, and is expected to be completed by Dec. 31, 2019. Fiscal 2019 operations and maintenance funds are being obligated at the time of award. Total cumulative face value of the contract is estimated $70,901,530. Air Force Life Cycle Management Center, Tinker Air Force Base, Oklahoma, is the contracting activity. Contract was awarded Dec. 20, 2018.