Under which condition does the AILC schedule use a higher temperature?

• A. When the slats are extended
• B. When the slats are retracted
• C. When the aircraft is on the ground
• D. When the wing is warming

Answer: (A)

The temperature setting in the AILC schedule rises in response to wing configuration that increases icing risk. When the slats are extended, the wing presents a larger leading-edge area and the airflow over the wing changes in a way that makes ice more likely to form at lower speeds. To counter this and keep the leading edge properly protected, the system steps up to a higher heat level. With slats retracted, the wing is less exposed and the icing threat is reduced, so the higher temperature is not needed. Ground conditions or general warming of the wing do not inherently require the elevated heat setting the same way extended slats do, which is why the higher-temperature step is tied to having the slats out.