Helicopter Sikorsky UH-60A Black Hawk Serial 70-326 Register 81-23604 used by US Army Aviation Army. Aircraft history and location Aircraft History 81-23604 US Army Aviation del US Army 1999-09-20 A 3II7 B Coy 1-147th AVN 20 Sep 1999, B Coy 1-147th AVN 1-147 AVN Send Updates Use APP to upload photo @ (optional) When Now? / / Send