Helicopter Sikorsky HR2S-1 Serial 56-070 Register 141616 used by US Marine Corps USMC. Built 1958. Aircraft history and location Aircraft History 141616 US Marine Corps 1958-02-14Sikorsky S-56, c/n 56-070, ff:? del USMC as HR2S-1, 141616, 14Feb58 wfu & soc unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send