United States, Aug. 27 -- RTX Corp., Pratt & Whitney Military Engines, East Hartford, Connecticut, is awarded a not-to-exceed $240,754,035 cost-plus-incentive-fee and cost-plus-fixed-fee modification (P00013) to previously awarded contract (N0001924C0042). This modification increases the not-to-exceed value, adding scope to provide non-recurring engineering to mature the F135 engine, address operational issues, improve readiness, and support the transition of the engine core upgrade from risk reduction design review into engineering and manufacturing development, including long-lead hardware for a spare test engine in support of the Air Force, Marine Corps, Navy, and F-35 Cooperative Program Partners F-35 Joint Strike Fighter programs.Work ...