Helicopter Sikorsky HO5S-1 Serial 52-017 Register 125524 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 125524 US Marine Corps 1952-04-23Sikorsky S-52-3, c/n 52-017, ff:? acc BuAerRep (BAR) East Hartford, CT, 23Apr52 del USMC as HO5S-1, 125524, 26Apr52. 1956-09soc sep56 Send Updates Use APP to upload photo @ (optional) When Now? / / Send