Rolls-Royce Corp., Indianapolis, Ind., is being awarded an $8,393,445 modification to a previously awarded firm-fixed-price contract (N00019-10-C-0020) to exercise an option for 17 CV-22 low power repairs for AE1107 Turboshaft engines for the Air Force.  Work will be performed in Oakland, Calif. (70 percent), and Indianapolis, Ind. (30 percent), and is expected to be completed in February, 2012.  Contract funds in the amount of $8,393,445 will expire at the end of the current fiscal year.  The Naval Air Systems Command, Patuxent River, Md., is the contracting activity.