Near takeoff or landing, anti-ice may be required under what conditions?

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Multiple Choice

Near takeoff or landing, anti-ice may be required under what conditions?

Anti-ice use near takeoff and landing is driven by actual icing conditions or the airline’s standard operating procedures. Ice can form quickly on wings, tails, and engine inlets when there is visible moisture (such as clouds, fog, rain, or drizzle) and temperatures near or at freezing. In those moments, enabling wing and engine anti-ice systems helps prevent ice buildup that would degrade lift, increase drag, or affect engine performance. If the aircraft’s SOP requires it, anti-ice must be used even if the atmosphere isn’t visibly icy, because the procedures account for uncertainties in the environment or sensor indications. That’s why the correct stance is that anti-ice may be required under icing conditions or per SOP. It isn’t always required in every condition, it isn’t never required during takeoff/landing, and it isn’t limited to when the aircraft is on the ground.

Anti-ice use near takeoff and landing is driven by actual icing conditions or the airline’s standard operating procedures. Ice can form quickly on wings, tails, and engine inlets when there is visible moisture (such as clouds, fog, rain, or drizzle) and temperatures near or at freezing. In those moments, enabling wing and engine anti-ice systems helps prevent ice buildup that would degrade lift, increase drag, or affect engine performance. If the aircraft’s SOP requires it, anti-ice must be used even if the atmosphere isn’t visibly icy, because the procedures account for uncertainties in the environment or sensor indications.

That’s why the correct stance is that anti-ice may be required under icing conditions or per SOP. It isn’t always required in every condition, it isn’t never required during takeoff/landing, and it isn’t limited to when the aircraft is on the ground.

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