Final answer:
The RAT MAN ON pushbutton deploys the Ram Air Turbine, which restores hydraulic power to critical flight control systems, typically the blue or green hydraulic circuit in a commercial aircraft.
Step-by-step explanation:
The question pertains to aircraft systems, specifically the Hydraulic Panel (HYD PANEL) and the Ram Air Turbine (RAT). When the RAT MAN ON pushbutton is pressed, it deploys the RAT, which is an emergency device designed to restore power to one of the aircraft's hydraulic systems in the event of a failure.
In most commercial aircraft, the RAT will provide power to critical flight control systems by restoring hydraulic pressure to the aircraft's blue or green hydraulic circuit, depending on the aircraft type. Its primary purpose is to ensure that pilots can maintain control of the aircraft in case of multiple hydraulic failures.
The RAT MAN ON pushbutton deploys the Ram Air Turbine, which restores hydraulic power to critical flight control systems, typically the blue or green hydraulic circuit in a commercial aircraft.