Helicopter Westland Sioux Serial wa380 Register G-CHOP XT221 used by Army Air Corps AAC (British Army). Built 1966. Aircraft history and location Aircraft History XT221 Army Air Corps AAC Sioux AH.1 G-CHOP - 1978-12private from Dec78 many owners 2011 appears on movie X-Men: First Class X-Men: First Class (2011) Send Updates Use APP to upload photo @ (optional) When Now? / / Send