Helicopter Sikorsky HRS-2 Serial 55-114 Register 129026 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 129026 US Marine Corps 1952-04-01Sikorsky S-55 c/n 55-114, ff:? del USMC as HRS-2, 129026, 01Apr52 1954-09-13 Sikorsky HRS-3 13sep54 1960-05-20 20may60 soc after accident Send Updates Use APP to upload photo @ (optional) When Now? / / Send