How is cabin pressure typically controlled in a pressurized aircraft?

In a pressurized aircraft, cabin pressure is typically controlled by an automatic outflow valve. This system is designed to manage the release of air from the cabin to maintain a specified cabin altitude, ensuring passenger comfort and safety.

The automatic outflow valve uses sensors and electronic control systems to continuously monitor cabin pressure and adjust the opening and closing of the valve in response to changes in altitude or cabin conditions. This automated approach helps to maintain optimal cabin pressure without requiring constant manual intervention from the flight crew, making it more efficient and reliable.

In contrast, while there may be systems involving manual controls, the automatic outflow valve is preferred for its ability to react quickly and accurately to varying flight conditions. It enhances the overall safety of the aircraft by preventing situations such as over-pressurization or loss of cabin pressure during the flight.