The Hughes OH-6 Cayuse (nicknamed "Loach", after the requirement acronym LOH—Light Observation Helicopter) is a single-engine light helicopter with a four-bladed main rotor used for personnel transport, escort and attack missions, and observation. Hughes Helicopters also developed the Model 369 as a civilian helicopter, and the Hughes Model 500, currently produced by MD Helicopters as the MD 500.
(369H) Commercial variant of the OH6 powered by an Allison 250-C18B.
(369HS) Commercial variant of the OH6 powered by an Allison 250-C20.
(369HE) A 369HS with higher standard interior fittings, Certified in 1969