L-3 Communications Vertex Aerospace LLC., Madison, Miss., is being awarded a $12,946,025 modification to a previously awarded firm-fixed-price, indefinite-delivery requirements contract (N00019-12-D-0003) for logistics services support of the TH-57 aircraft fleet. Services to be provided include repair and/or overhaul of aircraft, engines, avionics and related components. Work will be performed at the Naval Air Station, Whiting Field, Milton, Fla., and is expected to be completed in June 2013. Funds are not being obligated at time of award. Funds will be obligated on individual delivery orders as they are issued. The Naval Air Systems Command, Patuxent River, Md., is the contracting activity.