Helicopter Sikorsky HR2S-1 Serial 56-024 Register 140322 used by US Marine Corps USMC. Built 1957. Aircraft history and location Aircraft History 140322 US Marine Corps 1957-06-12Sikorsky S-56, c/n 56-024, ff:? del USMC as HR2S-1, 140322, 12Jun57 w/o unk. w/o 01jan65 Send Updates Use APP to upload photo @ (optional) When Now? / / Send