Helicopter Westland Sioux Serial wa411 Register XT499 used by Army Air Corps AAC (British Army). Built 1966. Aircraft history and location Aircraft History XT499 Army Air Corps 1966-10-06AAC Sioux AH.1 d/d 06Oct66, to Southend for spares 1981 Send Updates Use APP to upload photo @ (optional) When Now? / / Send