Air Transport World

Making automation behave. (safety and the use of autoflight mechanisms) (Editorial)

The captain, his airplane's throttles retarded to flight idle, entered an autopilot-coupled 115 approach. The autopilot tried to stay on the glideslope by raising the nose until the stick-shaker activated and the nose dropped to regain flying speed. The captain responded by pulling the nose back up, ignoring the power until too late.--Accident report.

The aircraft was climbing to cruise altitude with auto flight in the pitch mode instead of climb or airspeed mode. A high pitch angle bled off airspeed. Airframe icing contributed to a sudden stall and loss of 12,000 ft. of altitude. Aircraft was damaged in the recovery, and further damaged in the subsequent emergency landing.--Accident report. …

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