Which statement about Wing Anti-ice operation on the ground is true?

Which statement about Wing Anti-ice operation on the ground is true?

• A. It heats three most outboard slats
• B. It heats all wing slats
• C. It heats wing leading edge
• D. It cannot operate on the ground

Answer: (A)

Wing anti-ice protection is provided by heating the wing’s leading edge and its slats using bleed air. When the airplane is on the ground, the system is limited to energizing the three outermost slats. This targeted heating protects the most exposed area during taxi and takeoff in cold, wet, or icy conditions, while conserving bleed air and avoiding unnecessary heat in parts that aren’t at risk with low-speed airflow on the ground. In flight, anti-ice protection expands to cover the full leading edge and other slats as required by ice conditions. The system can operate on the ground as long as bleed air is available, so it’s not correct to say it cannot operate on the ground.

Wing anti-ice protection is provided by heating the wing’s leading edge and its slats using bleed air. When the airplane is on the ground, the system is limited to energizing the three outermost slats. This targeted heating protects the most exposed area during taxi and takeoff in cold, wet, or icy conditions, while conserving bleed air and avoiding unnecessary heat in parts that aren’t at risk with low-speed airflow on the ground. In flight, anti-ice protection expands to cover the full leading edge and other slats as required by ice conditions. The system can operate on the ground as long as bleed air is available, so it’s not correct to say it cannot operate on the ground.