Helicopter Westland Whirlwind HAS.7 Serial wa199 Register XL837 used by Fleet Air Arm RN (Royal Navy). Built 1957. Aircraft history and location Aircraft History XL837 Fleet Air Arm 1957-10-26Westland Whirlwind HAS.7, c/n WA199, ff: 26Oct57 del Royal Navy Fleet Air Arm as XL837, 09Dec57 w/o 30Jan59. Send Updates Use APP to upload photo @ (optional) When Now? / / Send