Under icing conditions, if icing is encountered for more than 10 minutes after selecting 10-degree flaps, should you land with 10-degree flaps?

• A. True
• B. False
• C. Not enough information
• D. Only if advised by the ICING annunciator

Answer: (B)

When ice is present and you’ve extended flaps to 10 degrees, continuing icing for more than 10 minutes means you should not land with that flap setting. Ice accumulating on the flap surface changes its aerodynamic shape and can disrupt airflow, making the wing performance unpredictable and increasing the risk of high drag, reduced lift, and stall characteristics during approach and landing. To minimize icing risk and maintain safer handling, retract the flaps to the clean configuration (flaps up) and proceed with a landing configuration that matches safe approach speeds under icing conditions. The decision isn’t delayed for an annunciator signal; relying on that alone isn’t appropriate.