February 27, 1963
OH-6A Cayuse:
First flight of the Hughes Model 369/YOH-6A (LOH competitor)
May 26, 1965
OH-6A Cayuse:
Light Observation Helicopter (LOH) contract awarded to Hughes OH-6A
April 6, 1966
YOH-6A Cayuse:
Record for maximum distance without landing achieved (Hughes YOH-6A)
December 17, 1981
OH-6A Cayuse:
First flight of a NOTAR equipped helicopter