Helicopter Westland Sioux Serial wa428 Register XT516 9M-AUP used by Army Air Corps AAC (British Army). Built 1967. Aircraft history and location Aircraft History 9M-AUP - Private XT516 1967 Army Air Corps AAC Sioux AH.1 unk to Malaysia as 9M-AUP 1975-0811 Flt of ANZUK Squadron, Singapore in Aug 1975 1 Flt Send Updates Use APP to upload photo @ (optional) When Now? / / Send