The Boeing Co., Mesa, Ariz., was awarded a $189,211,400 firm-fixed-price contract.  The award will provide for the modification of an existing contract to provide 16 AH-64D Apache aircraft and related support.  Work will be performed in Mesa, Ariz., with an estimated completion date of Feb. 28, 2014.  One bid was solicited, with one bid received.  The U.S. Army Contracting Command, Redstone Arsenal, Ala., is the contracting activity (W58RGZ-09-C-0161).