What indicates a properly functioning cabin pressure control system in an ERJ?

A properly functioning cabin pressure control system in an Embraer Regional Jet is indicated by consistent cabin pressure adjustments. This means the system effectively maintains the cabin pressurization within prescribed limits as the aircraft ascends and descends.

The primary function of the cabin pressure control system is to regulate the cabin altitude and ensure that it remains at a safe and comfortable level for passengers and crew. A consistent adjustment reflects responsiveness in managing changes in external atmospheric pressure during different phases of flight.

Normal operational noise levels pertain more to the overall operations of the aircraft and do not specifically indicate the performance of the cabin pressure control system. High fuel pressure readings are relevant to the fuel system and engine performance rather than cabin pressure dynamics. Similarly, stable engine performance, while crucial for flight safety and efficiency, does not directly relate to the effectiveness of cabin pressure control. Thus, consistent cabin pressure adjustments are the clear indicator of a properly functioning system.