10/21/2011:Working on an Army AH-64D Apache helicopter [slidepress gallery='working-on-an-army-ah64d-apache-helicopter'] Credit: 438th Air Expeditionary Wing:09/20/2011 In the first two photos, U.S. Army soldiers from C4 3-227 Assault Helicopter Battalion, 1st Air Calvary Brigade, 1st Calvary Division, out of Fort Hood Texas, perform preventative maintenance on a U.S. Army AH-64D Apache helicopter…