Rolls-Royce Corp., Indianapolis, Ind., is being awarded a $160,633,709 modification to a previously awarded firm-fixed-price contract to exercise an option to procure 78 AE1107C engines for the Navy MV-22 (62) and the Air Force (16). Work will be performed in Indianapolis, Ind., and is expected to be completed in December 2011. Contract funds in the amount of $16,004,539 will expire at the end of the current fiscal year. This contract combines purchase for the Navy ($128,100,122; 80 percent) and the Air Force ($32,533,587; 20 percent). The Naval Air Systems Command, Patuxent River, Md., is the contracting activity.