Aircraft will not be flown into what type of icing?

• A. Known or forecasted severe icing
• B. Light icing
• C. Moderate icing
• D. No icing conditions

Answer: (A)

The safety principle here is to avoid icing that is severe. Severe icing means heavy ice buildup that can rapidly degrade aerodynamics, raise stall speed, reduce elevator and aileron effectiveness, and overwhelm anti-icing or de-icing systems. If severe icing is known or forecast, you must not plan to fly into it because the aircraft may not be able to sustain safe flight or recover if conditions worsen.

Light or moderate icing may be encountered and handled within the aircraft’s certified limits with appropriate anti-ice/de-ice protections, so they aren’t categorically disallowed. No icing conditions simply means there’s no icing hazard, which is a completely different scenario and isn’t the prohibition described here.