Detailed history and photos of helicopter Sikorsky HO4S-3 Serial 55-505 Register 138495 used by US Navy USN Track service timeline and current status. Aircraft History 138495 US Navy 1953-07-24Sikorsky S-55 c/n 55-505, ff:? del USN as HO4S-3, 138495, 24Jul53. 1957-01-15w/o 15jan57 Send Updates Use APP to upload photo @ (optional) When Now? / / Send
