When are flaps typically retracted during flight?

Flaps are retracted during different phases of flight for several reasons related to performance and safety. Initially, during takeoff, after the aircraft has left the ground and when a safe climb rate is established, flaps are retracted. This reduces drag and allows the aircraft to gain speed more efficiently.

The decision to retract flaps is often made once the aircraft reaches a specific altitude, which ensures that the aircraft is in a safe configuration to transition to climb. It's recognized that keeping flaps extended can increase drag, which is counterproductive as the aircraft climbs and levels off.

During cruising flight, flaps are typically fully retracted to minimize drag and optimize fuel efficiency. The reduced drag at cruising altitudes is essential for maintaining speed and improving overall aircraft performance.

Thus, all of these scenarios are part of standard operating procedures for flap retraction, making the choice that includes all phases of flight the correct one.