Helicopter Sikorsky HR2S-1 Serial 56-041 Register 141608 used by US Marine Corps USMC. Built 1957. Aircraft history and location Aircraft History 141608 US Marine Corps 1957-06-05Sikorsky S-56, c/n 56-041, ff:? del USMC as HR2S-1, 141608, 05Jun57 wfu & soc unk. 1965-05-21soc 21may65 Send Updates Use APP to upload photo @ (optional) When Now? / / Send