Helicopter Sikorsky HR2S-1 Serial 56-001 Register 138418 used by US Marine Corps USMC. Built 1955. Aircraft history and location Aircraft History 138418 US Marine Corps 1955-09-30Sikorsky S-56, c/n 56-001, ff:? del US Marine Corps as HR2S-1, 138418, 30Sep55 soc & scr unk. 1959-06-23soc 23jun59 Send Updates Use APP to upload photo @ (optional) When Now? / / Send
