Helicopter Bell UH-1C Iroquois Serial 1689 Register 66-00707 used by US Army Aviation Army. Built 1966. Aircraft history and location Aircraft History 66-00707 US Army Aviation 1967-07-31US Army 188th Assault Helicopter Company (AHC), Fort Campbell, KY w/o 31jul67 mid air collision with 66-00710 at Tuy Hoa, Vietnam, 4 fatalities Send Updates Use APP to upload photo @ (optional) When Now? / / Send