Helicopter Sikorsky HRS-3 Serial 55-930 Register 144248 used by US Navy USN. Built 1956. Aircraft history and location Aircraft History 144248 US Navy 1956-07-17Sikorsky S-55 c/n 55-930, ff:? del USN as HRS-3, 144248, 17Jul56. Send Updates Use APP to upload photo @ (optional) When Now? / / Send