What happens when either TOGA switch is pressed while airborne?

When either TOGA switch is pressed while airborne, it primarily serves the function of providing maximum thrust to the engines. Specifically, the TOGA (Takeoff/Go-Around) power setting is intended for ensuring that the aircraft can achieve the necessary performance during critical phases of flight, such as climbing away from an approach or going around.

In the context of the question, the correct understanding is that pressing the TOGA switch in-flight does not activate emergency protocols, activate the landing gear, or function as a direct means to disconnect the autopilot. Instead, pressing the TOGA switch while airborne generally increases thrust, which allows the aircraft to climb or accelerate as needed.

Therefore, the primary action taken by the TOGA switch relates to providing increased thrust, enabling the aircraft to react appropriately in situations requiring additional power.