List of Operators of Sikorsky YCH-53E From Organisation with model YCH-53E 1979 US Marine Corps S-80 H-53E 180 1979/ Construction Numbers on database of YCH-53E 2ych-53e Construction Numbers Help Us C/NYearHistory 65-391 1974 159121 65-392 1974 159122 2 C/N.