weather theoryFAA-published sample question (IRA, Aug 2021)
On initial climb-out after takeoff and with the autopilot engaged, you encounter icing conditions. In this situation you can expect
A
ice to accumulate on the underside of the wings due to the higher AOA.✓ Correct Answer
B
the autopilot to hold the vertical speed, if the anti-icing boots are working.
C
the increased airflow under the wings to prevent the accumulation of ice.
Explanation
AC 91-74B points out that during initial climb-out the lower speed means a higher angle of attack, which exposes the underside of the airplane and its wings to the icing and lets ice accumulate farther aft than in cruise. The autopilot can mask the resulting handling changes rather than protect you, and extra airflow under the wing does not prevent ice; it is what carries the droplets there.
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