Helicopter Westland Whirlwind HAS.7 Serial wa166 Register XK939 used by Fleet Air Arm RN (Royal Navy). Built 1957. Aircraft history and location Aircraft History XK939 Fleet Air Arm 1957-09-17Westland Whirlwind HAS.7, c/n WA166, ff: 17Sep57 del Royal Navy Fleet Air Arm as XK939, 22Sep57 w/o 24Jul63 scr 25Aug64. Send Updates Use APP to upload photo @ (optional) When Now? / / Send