Helicopter Sikorsky HR2S-1 Serial 56-096 Register 145863 used by US Marine Corps USMC. Built 1958. Aircraft history and location Aircraft History 145863 US Marine Corps 1958-08-13Sikorsky S-56, c/n 56-096, ff:? del USMC as HR2S-1, 145863, 13Aug58 wfu & soc unk. 1966-11-30soc 30nov66 Send Updates Use APP to upload photo @ (optional) When Now? / / Send