When established on downwind, what should you do?

When established on downwind, the correct action is to lower flaps as required. This step is essential in preparing the aircraft for landing and achieving the desired approach configuration. Lowering the flaps modifies the aircraft's performance characteristics, allowing for better lift at lower speeds, which is crucial as the aircraft approaches the runway.

Lowering flaps helps in controlling the descent rate and ensures that the aircraft can maintain a stable approach speed. Additionally, adjusting the flaps can assist in managing drag, which is particularly important during the landing phase. Proper flap extension is part of the standard operating procedures for landing, allowing the pilot to set the aircraft up for a safe and controlled landing on the final approach.

While changing airspeed, performing a go-around, or reducing throttle are also elements of flight operations, they pertain to other phases of the approach or may be reactions to certain situations rather than the standard procedure when established on downwind.