When may induction icing occur?

Induction icing may occur while taxiing under high humidity conditions because the engine's air intake can ingest moisture that leads to ice formation as the air temperature drops. When the humidity levels are high, and conditions are favorable (such as lower temperatures), moisture condenses in the air intake. As the engine compresses this moisture, it can freeze, leading to the development of ice that can impede engine performance.

This process highlights the importance of monitoring weather and humidity conditions, especially when operating on the ground. The other options typically do not present conditions conducive to induction icing. For example, high-speed descents often occur at lower temperatures but are not directly linked to the conditions necessary for induction icing, which is primarily moisture-related rather than temperature alone. Likewise, while snowstorms may present some icing risk, they are not a necessary condition for induction icing to occur, and clear skies with low humidity generally do not lead to moisture in the air sufficient to create induction icing at all.