Helicopter Sikorsky HO5S-1 Serial 52-022 Register 126697 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 126697 US Marine Corps 1952-05-29Sikorsky S-52-3, c/n 52-022, ff:? acc BuAerRep (BAR) East Hartford, CT, 29May52 del USMC as HO5S-1, 126697, 03Jul52. soc 3dec54 Send Updates Use APP to upload photo @ (optional) When Now? / / Send