Rolls-Royce Corp., Indianapolis, Ind., is being awarded a $12,048,011 modification to a previously awarded firm-fixed-price contract (N00019-07-C-0060) for the procurement of 6 AE1107C engines for the Air Force CV-22 aircraft (four spares and two installs).  Work will be performed in Indianapolis, Ind., and is expected to be completed in December 2012.  Contract funds will not expire at the end of the current fiscal year.  The Naval Air Systems Command, Patuxent River, Md., is the contracting activity.