Helicopter Westland Sioux Serial wa377 Register XT218 used by Army Air Corps AAC (British Army). Built 1966. Aircraft history and location Aircraft History XT218 Army Air Corps AAC Sioux AH.1 unk sold in Hong Kong 1978 1976 A Seria heliportC Flt at Seria, supporting 7th Gurkha Rifles. 656 Squadron Send Updates Use APP to upload photo @ (optional) When Now? / / Send