Takeoff wind limit for a contaminated runway?

• A. 35 knots
• B. 25 knots
• C. 15 knots
• D. 20 knots

Answer: (C)

On a contaminated runway, directional control and braking effectiveness are reduced because the tire–surface interaction is degraded by water, slush, or snow. Because of this, takeoff crosswinds must be limited to keep the airplane tracking on the runway during the ground roll and to ensure a safe liftoff with adequate rudder authority. The established takeoff wind limit for contaminated surfaces is 15 knots, so you stay within a safety margin that accounts for potential gusts and uneven contamination. Winds higher than this increase the risk of losing direction or failing to establish a stable liftoff. Therefore, 15 knots is the correct limit.