Helicopter Westland Sioux Serial wa706 Register XW186 used by Army Air Corps AAC (British Army). Built 1969. Aircraft history and location Aircraft History XW186 Army Air Corps 1969-01-14AAC Sioux AH.1 d/d 14jan69, s.o.c 19nov75 as CAT 5(S) Send Updates Use APP to upload photo @ (optional) When Now? / / Send