What is one way to retract the speed brake in the T-6 aircraft?

In the T-6 aircraft, one way to retract the speed brake is by moving the PCL (Power Control Lever) to the MAX position. The speed brake system is designed to extend when the PCL is brought back to idle or during descents, allowing for increased drag and controlled descent rates. When the PCL is moved to the MAX position, it signals the airframe to retract the speed brake to minimize drag and allow the aircraft to maintain speed and performance as needed, especially during climb or acceleration.

This mechanism is crucial for managing the aircraft's speed and performance efficiently during various phases of flight. Other actions, such as extending flaps, retracting landing gear, or moving the switch backward, are not directly associated with the function of retracting the speed brake. Instead, these options involve different systems or configurations within the aircraft.