Helicopter Bell OH-58A Kiowa Serial 41592 Register 71-20731 used by US Army Aviation Army. Aircraft history and location Aircraft History 71-20731 US Army Aviation US Army 1974 A KHOP -1976, I was Crewchief of this a/c with B troop 2/17 cav Ft Campbell, KY Send Updates Use APP to upload photo @ (optional) When Now? / / Send