What is the maximum taxi speed when turning on a wet or contaminated surface?

The maximum taxi speed on wet or contaminated surfaces is limited to 5 knots to ensure safe aircraft handling and control. This lower speed helps reduce the risk of hydroplaning or losing traction, which can occur when the aircraft is moving too fast on surfaces affected by water, ice, or snow. By keeping the speed at this level, pilots can maintain better directional control, promote safer maneuvering during turns, and minimize the potential for skidding or sliding. The specific threshold is established as a safety measure to accommodate the reduced friction that these conditions create, ensuring both the safety of the aircraft and the crew.