What does Cabin Differential Pressure measure?

Cabin Differential Pressure measures the difference between the ambient air pressure outside the aircraft and the internal air pressure within the cabin. This measurement is crucial for ensuring the safety and comfort of passengers and crew, as it impacts cabin pressurization. When an aircraft climbs to cruising altitude, the outside ambient pressure decreases significantly. The cabin is pressurized to maintain a safe and comfortable environment for those on board.

By monitoring this differential pressure, flight engineers can ensure that the cabin remains within safe limits, preventing any potential issues related to inadequate pressurization, such as hypoxia or structural stress on the aircraft. An understanding of this concept is essential for managing aircraft systems effectively during flight operations.