Helicopter Sikorsky HO4S-3 Serial 55-581 Register 138516 used by US Navy USN. Built 1953. Aircraft history and location Aircraft History 138516 US Navy 1953-11-10Sikorsky S-55 c/n 55-581, ff:? del USN as HO4S-3, 138516, 10Nov53. 1955 A McMurdo Stationwith VX-6 at McMurdo Station until c 1958. VXE-6 Send Updates Use APP to upload photo @ (optional) When Now? / / Send
