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YAH-64 (Hughes 1975)

In 1973, the Hughes Model 77 was selected as the winner of the Army's advanced attack helicopter (AAH) competition. The prototype made its first flight in 1975 as the YAH-64, and in 1976 the company received a full-scale development contract. In 1982 the Army gave the program, now known as AH-64A Apache, production go-ahead. Deliveries of production Apaches began in 1984.

YAH-64