Helicopter Sikorsky HRS-1 Serial 55-079 Register XB-WOJ N9010R N90010 127839 used by US Marine Corps USMC. Built 1951. Aircraft history and location Aircraft History 127839 US Marine Corps 1951-11-02Sikorsky S-55 c/n 55-079, ff:? del USMC as HRS-1, 127839, 02Nov51 N90010 - ex 127839 N9010R - ex N90010 XB-WOJ - ex N9010R Send Updates Use APP to upload photo @ (optional) When Now? / / Send