Detailed history and photos of helicopter Sikorsky HO4S-3 Serial 55-530 Register 138501 used by US Navy USN Track service timeline and current status. Aircraft History 138501 US Navy 1953-09-16Sikorsky S-55 c/n 55-530, ff:? del USN as HO4S-3, 138501, 16Sep53. 1958-05-14w/o 14may58 soc 170658 San Diego Send Updates Use APP to upload photo @ (optional) When Now? / / Send
