Helicopter Sikorsky S-51 / R-5 / H-5 Serial 51-109 Register 9604 used by Royal Canadian Air Force (1945-1968). Aircraft history and location Aircraft History 9604 Royal Canadian Air Force (1945-1968) to RCAF 9604 1962OU-604 A CFB RiversCanadian Joint Training Centre / OU-604 by 1962 Send Updates Use APP to upload photo @ (optional) When Now? / / Send