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