Helicopter Sikorsky HR2S-1 Serial 56-007 Register 138423 used by US Marine Corps USMC. Built 1956. Aircraft history and location Aircraft History 138423 US Marine Corps 1956-08-24Sikorsky S-56, c/n 56-007, ff:? del US Marine Corps as HR2S-1, 138423, 24Aug56 soc & scr unk. 1960-04-18 soc 18apr60 Send Updates Use APP to upload photo @ (optional) When Now? / / Send
