Helicopter Westland Wessex HAS.1 Serial wa253 Register XS873 used by Fleet Air Arm RN (Royal Navy). Built 1965. Aircraft history and location Aircraft History XS873 Fleet Air Arm Westland HAS.1, c/n WA253, f/f: ? del Royal Navy as XS873, 07/10/1965 to A2686, unk scr. Predannack 08/1995. 1975 A EGDR /CU525 Rescue Send Updates Use APP to upload photo @ (optional) When Now? / / Send