Air Crash Investigation - Mayday

On 9 October 2002, Northwest Airlines Flight 85 is cruising above the Bering Sea, when the lower rudder segment suddenly deflects to the left. The pilots divert the aircraft to a successful emergency landing at Anchorage, Alaska, by using engine thrust for control. The incident was attributed to a fatigue failure of the rudder hydraulic control module, resulting in part of the module's metal casing breaking off.