Which statement about icing conditions and low speed mode is true?

• A. Low speed mode is approved for use in icing
• B. Low speed mode is NOT approved for use in icing
• C. Low speed mode has no relation to icing conditions
• D. Low speed mode is only allowed during takeoff

Answer: (B)

In icing conditions, flight modes that alter speed management at the low end can create unsafe situations because ice changes how the airplane behaves and how much margin you have near the stall. Low speed mode is designed to help the airplane operate close to stall in normal conditions, but ice raises the stall speed and can make automated adjustments in that mode unreliable or unsafe. For that reason, the system is not approved for use in icing. Use standard, non-iced configurations and rely on de-icing/anti-icing as specified, rather than engaging low speed mode when ice is present.

The other possibilities don’t fit because extending or implying safety in icing, or restricting use to only takeoff, would contradict the certification and operating procedures that prohibit relying on that mode during ice.