Continuous icing duration limit applies to which icing severities?

• A. Mild icing
• B. Severe icing
• C. Moderate icing
• D. Moderate or severe icing

Answer: (D)

The time limit is tied to the level of icing severity where ice buildup can more quickly compromise safety. When icing is moderate or severe, the effects on aerodynamics, control, and performance become significant enough that a defined continuous exposure limit is set to ensure you have a way out before conditions deteriorate further. Mild icing, by contrast, does not require a hard continuous-duration cap because its impact is less severe and can be managed with normal procedures and anticipated changes in altitude or route. So the continuous icing duration limit is applicable to moderate or severe icing.