Flight aimed at demonstrating a landing with hydraulic failure. With the hydraulic control was disconnected, the pilot made the approach to the runway, and attempted to make a vertical landing (zero speed with the helicopter hovering). With the aircraft hovering, the pilot lost control of the helicopter, and the tail boom hit the ground. The aircraft impacted the ground uncontrolled, and sustained serious damage.. Pilot named as Almir Carlos Bezerra and copilot as Osvaldo
