What is the maximum cabin altitude that can be achieved before the Outflow Valve closes?

The maximum cabin altitude that can be achieved before the Outflow Valve closes is 14,500 feet. This altitude is significant because the Outflow Valve, which regulates cabin pressure, is designed to maintain cabin altitude at a safe and comfortable level for passengers and crew.

When the aircraft climbs, the Outflow Valve remains open to allow the cabin to pressurize properly. However, as the cabin altitude approaches 14,500 feet, the valve will begin to close to prevent exceeding this threshold. The cabin altitude limit of 14,500 feet is set to ensure that the cabin remains within a range where supplemental oxygen is not required for prolonged periods and physiological safety is maintained.

This knowledge is critical for pilots and crew to monitor during flight operations, particularly in high-altitude environments, and helps ensure compliance with safety regulations and passenger comfort.