Helicopter Westland Sioux Serial wa330 Register XT171 used by Army Air Corps AAC (British Army). Built 1965. Aircraft history and location Aircraft History XT171 Army Air Corps AAC Sioux AH.1 1965-11-25 w/o 25nov65 I crashed this helicopter due to disorientation on a night cross country exercise. Ian Uzzell Send Updates Use APP to upload photo @ (optional) When Now? / / Send