Time with WING ICE PROTECTION button ON and thrust higher than idle while stationary cannot exceed how many seconds?

Time with WING ICE PROTECTION button ON and thrust higher than idle while stationary cannot exceed how many seconds?

• A. 30 seconds
• B. 15 seconds
• C. 60 seconds
• D. 10 seconds

Answer: (B)

Wing ice protection on while the aircraft is stationary with thrust above idle is limited to fifteen seconds. The reasoning is that with the aircraft not moving, there isn’t enough airflow to carry away the heat generated by the wing anti-ice system, so leaving it energized too long can overheat components or cause unnecessary wear. The fifteen‑second limit keeps the system from damage while you’re on the ground. If you need protection longer, you would cycle the system or reduce thrust to manage cooling and re-engage as appropriate.

Wing ice protection on while the aircraft is stationary with thrust above idle is limited to fifteen seconds. The reasoning is that with the aircraft not moving, there isn’t enough airflow to carry away the heat generated by the wing anti-ice system, so leaving it energized too long can overheat components or cause unnecessary wear. The fifteen‑second limit keeps the system from damage while you’re on the ground. If you need protection longer, you would cycle the system or reduce thrust to manage cooling and re-engage as appropriate.