Helicopter Sikorsky HRS-3 Serial 55-919 Register 144244 used by US Navy USN. Built 1956. Aircraft history and location Aircraft History 144244 US Navy 1956-03-26Sikorsky S-55 c/n 55-919, ff:? del USN as HRS-3, 144244, 26Mar56. Send Updates Use APP to upload photo @ (optional) When Now? / / Send