Helicopter Sikorsky HO5S-1 Serial 52-027 Register 126702 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 126702 US Marine Corps 1952-06-20Sikorsky S-52-3, c/n 52-027, ff:? acc BuAerRep (BAR) East Hartford, CT, 20Jun52 del USMC as HO5S-1, 126702, 25Jun52. 1956-10-23soc 23oct56 Send Updates Use APP to upload photo @ (optional) When Now? / / Send