Helicopter Westland Sioux Serial wa435 Register XT546 used by Army Air Corps AAC (British Army). Built 1967. Aircraft history and location Aircraft History XT546 Army Air Corps AAC Sioux AH.1 unk sold in Hong Kong 1978 1975-04 A VHSK 11 Flight spare Originally transferred to 11 Flight at Sek Kong in early-mid 1975 to act as a spare for its all Sioux detachment in Brunei. 1978-11-17 A VHSK Flying display Believed to be the last flight of an Army Sioux in the Far East, at the RAF Sek Kong Airshow on 17 Nov 1978. Send Updates Use APP to upload photo @ (optional) When Now? / / Send