Sikorsky Aircraft Corp., Stratford, Conn., is being awarded a $25,674,383 modification to a previously awarded cost-plus-incentive-fee contract (N00019-06-C-0081) to provide detailed maintenance plans in support of the CH-53K helicopter program.  Work will be performed in Stratford, Conn., and is expected to be completed in December 2015.  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.