Helicopter Sikorsky YCH-53E Serial 65-391 Register 159121 used by US Marine Corps USMC. Built 1974. Aircraft history and location Aircraft History 159121 US Marine Corps 1974-03-01Sikorsky S-65E prototype Super Stallion, c/n 65-391, ff: 01Mar74 del USN NPRO as YCH-53E, 159121, unk w/o 15Sep74. 01mar74 on its maiden flight. Note the different tail planes compared to the later production models, the first of which flew on 13dec80 Send Updates Use APP to upload photo @ (optional) When Now? / / Send
