Which system manages the cabin pressure in the aircraft?

The cabin pressure control system is specifically designed to manage the cabin altitude and ensure that the pressure within the aircraft cabin remains at a comfortable and safe level for passengers and crew during flight. This system regulates the outflow of air from the cabin and balances it with the incoming air from the engines or auxiliary sources, depending on the phase of flight. It is critical for maintaining a safe environment, as cabin altitude needs to be managed effectively to prevent hypoxia and ensure physiological comfort.

The emergency power system is not responsible for cabin pressure; rather, it provides power to essential systems in case of a main power failure. The essential bus management system deals with the distribution of electrical power to critical flight systems, ensuring they remain operational. The avionics power distribution system also focuses on managing power for electronic navigation and communication equipment, rather than cabin pressure. Thus, the cabin pressure control system is the only system among the choices that directly handles the management of cabin pressure in the aircraft.