Alliant Techsystems Operations LLC, Clearwater, Fla., is being awarded a $20,017,724 modification to a previously awarded firm-fixed-price contract (N00019-13-C-0009) to procure various AN/AAR-47 Missile Warning System Weapons Replaceable Assemblies.  These newly manufactured assemblies include 92 A(V)2 and 328 B(V)2 Integrated Optical Sensor Convertors; 18 A(V)2 and 99 B(V)2 Computer Processors.  Additionally, this effort will procure 240 A(V)2 to B(V)2 Integrated Optical Sensor Convertor retrofits, and 60 A(V)2 to B(V)2 Computer Processor retrofits for the U. S. Navy and Air Force assets will repair hardware to Ready For Issue condition and will cover technical and cost data submissions.  These systems are for installation on U. S. Navy, Marine Corps, and Air Force helicopters, rotorcraft and low/slow flying, fixed wing aircraft.  Additionally, these systems are for installation on aircraft platforms operated by the government of Denmark.  Work will be performed in Clearwater, Fla. (72 percent); Austin, Texas (18 percent); Netanya, Israel (2 percent); Iwata City, Japan (2 percent); Loveland, Colo. (2 percent); Northvale, N.J. (1 percent) and various locations throughout the U.S. (3 percent) and is expected to be completed in December 2015.  This contract combines purchases for the U.S. Air Force ($14,053,905; 70.2 percent); U.S. Navy ($5,201,239; 26 percent); and the government of Denmark ($762,580; 3.8 percent) under the Foreign Military Sales (FMS) Program.  Fiscal 2013 Aircraft Procurement Navy, fiscal 2011 and 2012 Aircraft Procurement Air Force and FMS funds in the amount of $20,017,724 will be obligated at the time of award, $4,117,884 of which will expire at the end of the current fiscal year.  The Naval Air Systems Command, Patuxent River, Md., is the contracting activity.