Detailed history and photos of helicopter Sikorsky HRS-3 Serial 55-929 Register 144247 used by US Navy USN Track service timeline and current status. Aircraft History 144247 US Navy 1956-04-16Sikorsky S-55 c/n 55-929, ff:? del USN as HRS-3, 144247, 16Apr56. Send Updates Use APP to upload photo @ (optional) When Now? / / Send
