Do not change FLOW, ENGINE ICE, or WING ICE until what altitude?

Do not change FLOW, ENGINE ICE, or WING ICE until what altitude?

• A. 200 feet
• B. 400 feet
• C. 1000 feet
• D. 500 feet

Answer: (B)

In icing conditions, you want to keep the ice-protection configuration stable through the critical takeoff and initial climb. The main idea here is to avoid changing FLOW, ENGINE ICE, or WING ICE during that high-workload, low-altitude phase and instead leave them in their takeoff setup until you’ve established a safe climb. 400 feet above the ground is the point at which you’ve moved past the immediate takeoff transition and have enough altitude to reassess without compromising flight safety. Making changes before reaching this altitude can distract from managing airspeed, attitude, and configuration, while waiting until after this point keeps you protected if icing persists and gives you a clear window to modify as needed once you’re more stable in climb. So, you should not change those ice/flow settings until you reach about 400 feet AGL.

In icing conditions, you want to keep the ice-protection configuration stable through the critical takeoff and initial climb. The main idea here is to avoid changing FLOW, ENGINE ICE, or WING ICE during that high-workload, low-altitude phase and instead leave them in their takeoff setup until you’ve established a safe climb.

400 feet above the ground is the point at which you’ve moved past the immediate takeoff transition and have enough altitude to reassess without compromising flight safety. Making changes before reaching this altitude can distract from managing airspeed, attitude, and configuration, while waiting until after this point keeps you protected if icing persists and gives you a clear window to modify as needed once you’re more stable in climb.

So, you should not change those ice/flow settings until you reach about 400 feet AGL.