When the air conditioning RAM AIR switch is ON and differential pressure is less than 1 PSI, what action is taken regarding the outflow valve?

When the air conditioning RAM AIR switch is ON and the differential pressure is less than 1 PSI, the outflow valve is designed to open approximately 50 percent when in AUTO mode. This function is important for maintaining the proper cabin pressure by allowing outside air to enter the cabin when necessary.

In AUTO mode, the system intelligently adjusts the outflow valve based on various parameters, including differential pressure, to ensure efficient airflow while managing cabin pressure during normal operations. The specific opening percentage is set to optimize the balance between cabin pressure and external conditions, facilitating effective ventilation.

Understanding this behavior is crucial for ensuring passenger comfort and safety, as it directly influences cabin pressure dynamics when the aircraft is operating under various flight conditions.