Helicopter Sikorsky HO4S-3 Serial 55-878 Register 55878 used by Royal Canadian Navy (1945-1968). Built 1955. Aircraft history and location Aircraft History 55878 Royal Canadian Navy (1945-1968) 1955-08-25HO4S-3 RCN d/d 25aug55 wfu 15nov68 Send Updates Use APP to upload photo @ (optional) When Now? / / Send