Helicopter Sikorsky HRS-3 Serial 55-990 Register 144253 used by US Navy USN. Built 1956. Aircraft history and location Aircraft History 144253 US Navy 1956-08-28Sikorsky S-55 c/n 55-990, ff:? del USN as HRS-3, 144253, 28Aug56. Send Updates Use APP to upload photo @ (optional) When Now? / / Send