NTSB Issues Safety Recommendation to Beech Aircraft Corporation Regarding Autopilot Systems

The National Transportation Safety Board has issued recommendation A-94-163, designated LAX91FA324, directing Beech Aircraft Corporation to take immediate action regarding the function, operation, and limitations of autopilot systems installed in its airplanes. The board requires the manufacturer to issue a safety communique that outlines the essential need for preflight safety checks and points out the potential hazards associated with trimming the airplane through pilot-induced or other abnormal operation of the autopilot-electric trim system. This directive specifically references accidents involving aircraft N766BA, N77CQ, and N25805 to highlight the risks involved. The communique must emphasize the importance of strictly adhering to prescribed operating and procedural instructions contained in respective airplane flight manual supplements and autopilot operating manuals. Furthermore, it must stress the necessity for pilots to thoroughly understand the remedial measures or emergency procedures required to resolve an autopilot malfunction or problem effectively.