De Havilland Canada DHC-5 Buffalo has been developed on the basis of DHC-4 Caribou. The aircraft had larger fuselage if compared to its prototype. In conducted its first flight on April 9th 1964. US army for test flights ordered four machines. The aircraft has received initial designation C-8A. After the test program, Canadian AF ordered 15 aircraft DHC-5A (CC-115). Six of them were used for navy patrol. Some aircraft wee built for AF of Brazil and Peru. In 1974 the production of the new modification DHC-5D started. This type had more powerful engines and improved flying parameters. The production of Buffalo ceased in 1982. Aircraft DHC-5D were supplied to the AF of Cameroon (3 machines), Ecuador (3 machines), Egypt (10) and some other countries.