During icing approach, after selecting 10 degrees flaps, wait how many seconds before selecting 30 degrees flaps?

During icing approach, after selecting 10 degrees flaps, wait how many seconds before selecting 30 degrees flaps?

• A. 5 seconds
• B. 10 seconds
• C. 15 seconds
• D. 30 seconds

Answer: (C)

In icing approach you don’t jump straight to full flap. Starting with a small flap setting gives you a predictable, stable configuration as ice continues to form. The 15-second wait after selecting 10 degrees allows the airplane to settle into that configuration—airspeed, descent rate, and trim respond, and you can verify there are no unexpected control or handling issues with the ice present. Once stability is confirmed, you advance to the larger flap setting to achieve the final approach configuration with enough lift and drag for a safe landing. This dwell time helps prevent abrupt pitch or airspeed changes that could come with a rapid flap transition in icing conditions.

In icing approach you don’t jump straight to full flap. Starting with a small flap setting gives you a predictable, stable configuration as ice continues to form. The 15-second wait after selecting 10 degrees allows the airplane to settle into that configuration—airspeed, descent rate, and trim respond, and you can verify there are no unexpected control or handling issues with the ice present. Once stability is confirmed, you advance to the larger flap setting to achieve the final approach configuration with enough lift and drag for a safe landing. This dwell time helps prevent abrupt pitch or airspeed changes that could come with a rapid flap transition in icing conditions.