Helicopter Sikorsky HRS-1 Serial 55-029 Register 127795 used by US Marine Corps USMC. Built 1951. Aircraft history and location Aircraft History 127795 US Marine Corps 1951-06-02Sikorsky S-55 c/n 55-029, ff:? del USMC as HRS-1, 127795, 02Jun51 1952-10-30 w/o 30oct52 accident in Korea Send Updates Use APP to upload photo @ (optional) When Now? / / Send