Helicopter Sikorsky HR2S-1 Serial 56-046 Register 141609 used by US Marine Corps USMC. Built 1958. Aircraft history and location Aircraft History 141609 US Marine Corps 1958-02-12Sikorsky S-56, c/n 56-046, ff:? del USMC as HR2S-1, 141609, 12Feb58 wfu & soc unk. soc 3jun68 Send Updates Use APP to upload photo @ (optional) When Now? / / Send