For takeoff in the example weather, which anti-ice system combination is required?

For takeoff in the example weather, which anti-ice system combination is required?

• A. Cowls and Wings
• B. Wings only
• C. Cowl only
• D. None

Answer: (A)

Protecting critical surfaces in icing conditions means you must keep ice off both the engine inlet/cowl area and the wing leading edges during takeoff. Engine cowl anti-ice prevents ice from forming around the nacelle and inlet, which could shed ice into the engine or cause a loss of thrust. Wing anti-ice keeps the wing’s leading edges ice-free, preserving lift and maintaining the proper stall characteristics. In the weather shown, procedures require both systems to be energized for takeoff so you’re protected on both surfaces during this high-risk phase. If only one surface were protected, ice could still build up on the other, compromising power delivery or lift and reducing safety margins. Therefore, the correct combination is to have both cowls and wings anti-ice active.

Protecting critical surfaces in icing conditions means you must keep ice off both the engine inlet/cowl area and the wing leading edges during takeoff. Engine cowl anti-ice prevents ice from forming around the nacelle and inlet, which could shed ice into the engine or cause a loss of thrust. Wing anti-ice keeps the wing’s leading edges ice-free, preserving lift and maintaining the proper stall characteristics. In the weather shown, procedures require both systems to be energized for takeoff so you’re protected on both surfaces during this high-risk phase. If only one surface were protected, ice could still build up on the other, compromising power delivery or lift and reducing safety margins. Therefore, the correct combination is to have both cowls and wings anti-ice active.