What is the green arc range for the pneumatic pressure gauge?

The green arc range for the pneumatic pressure gauge in the King Air 350 is 12-20 PSI. This range indicates the normal operating pressure for the aircraft's pneumatic system, which is crucial for various functions including engine de-ice and cabin pressurization. Operating within this range ensures that the pneumatic systems function effectively and helps to prevent potential malfunctions or system failures.

Understanding the significance of the green arc range is essential for safe flight operations, as pressures outside of this specified range could lead to inadequate performance of the pneumatic systems. This is particularly important for maintaining safety during critical flight phases such as takeoff and landing, where reliable pneumatic pressure is required for systems like de-icing.