What is the maximum altitude the aircraft can fly with the yaw damper inoperative?

The correct maximum altitude for flight with the yaw damper inoperative is 31,000 feet. This limitation is established due to the crucial role of the yaw damper in maintaining aircraft stability and preventing adverse yaw, especially during turns and maneuvers. When the yaw damper is functioning, it assists in providing smooth and coordinated flight, enhancing both safety and passenger comfort.

At altitudes above 31,000 feet, the consequences of flying without the yaw damper can become more pronounced due to the decreased air density and the increased need for precise control inputs. This makes it essential to restrict operations to a lower altitude where the pilot can manage yaw control more effectively without the assistance of the yaw damper.