What happens when the Go-Around button is pressed on the left power lever?

Pressing the Go-Around button on the left power lever initiates a process critical for safely executing a go-around maneuver during landing. The functionality associated with this action includes setting the Flight Director (FD) to Go-Around mode, which provides guidance to the pilots for executing the maneuver effectively. Additionally, this action causes the autopilot to disengage, allowing the pilots to assume manual control of the aircraft during the go-around.

Setting the FD to Go-Around mode is essential, as it sets a specific flight path and parameters needed for climbing away from the runway or missed approach pattern, ensuring that pilots have clear guidance. Disengaging the autopilot at this critical moment ensures that pilots can respond swiftly to the aircraft's behavior and adjust the flight controls as needed, which is crucial for safety during a go-around.

This contextual understanding highlights the importance of both the Flight Director setting and the autopilot disengagement in aiding pilots during a critical phase of flight, making the selected answer the most appropriate response.