Outflow Valve will only allow the cabin to rise to which altitude?

Outflow Valve will only allow the cabin to rise to which altitude?

• A. 13,500 Feet
• B. 14,000 Feet
• C. 14,500 Feet +/- 500 Feet
• D. 15,000 Feet

Answer: (C)

The outflow valve regulates cabin pressure by venting air to the outside and works with the cabin pressure controller to hold the cabin at a selected pressure (equivalent cabin altitude). As the aircraft climbs, the valve modulates how much air is vented so the pressure difference between inside and outside stays within the system’s limits. There is a designed ceiling for how high the cabin altitude can rise in normal operation, determined by the valve’s venting capacity and the maximum differential pressure the system can maintain. For this airplane, that ceiling is around 14,500 feet, with tolerance about ±500 feet. So, under normal operation, the cabin altitude will rise only to roughly 14,000–15,000 feet and then stabilize, rather than climbing higher.

The outflow valve regulates cabin pressure by venting air to the outside and works with the cabin pressure controller to hold the cabin at a selected pressure (equivalent cabin altitude). As the aircraft climbs, the valve modulates how much air is vented so the pressure difference between inside and outside stays within the system’s limits. There is a designed ceiling for how high the cabin altitude can rise in normal operation, determined by the valve’s venting capacity and the maximum differential pressure the system can maintain. For this airplane, that ceiling is around 14,500 feet, with tolerance about ±500 feet. So, under normal operation, the cabin altitude will rise only to roughly 14,000–15,000 feet and then stabilize, rather than climbing higher.