What is the appropriate control column movement to initiate a left roll in an aircraft?

To initiate a left roll in an aircraft, the control column must be moved to the left. This action causes the aileron on the left wing to deflect upward and the aileron on the right wing to deflect downward. The upward deflection of the left aileron decreases the lift on that wing, while the downward deflection of the right aileron increases lift on that wing. As a result, the aircraft begins to roll to the left due to the differential lift generated by the ailerons.

Understanding this motion is crucial for pilots, as it demonstrates the fundamental principles of aircraft control and how inputs on the control column directly translate into changes in aircraft attitude and orientation. Thus, moving the control column to the left is the correct input for initiating a left roll.