Sikorsky Aircraft Corp., Stratford, Connecticut, is being awarded a $46,945,004 modification to a previously awarded indefinite-delivery/indefinite-quantity contract (N00019-07-D-0004) to exercise an option for special progressive aircraft rework for two VH-3D and one VH-60N presidential helicopters, including training, security, and project engineering, integrated logistics and program support. Work will be performed in Stratford, Connecticut (88 percent), and Quantico, Virginia (12 percent), and is expected to be completed in November 2015. No funds will be obligated at time of award; funds will be obligated on individual delivery orders as they are issued. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.