What does a bleed air pressure gauge indicate?

The bleed air pressure gauge measures the pressure of the bleed air, which is air taken from the engine's compressor section. This air is used for various purposes, including cabin pressurization, engine starting, and environmental control systems. The pressure indicated by this gauge is crucial for determining whether the bleed air system is functioning correctly and can provide the necessary air to systems that rely on it.

Monitoring bleed air pressure is essential for the efficient operation of the aircraft systems that utilize this air. If the pressure is too low, it could indicate issues with the engine or the bleed air system, potentially impacting performance and safety. Hence, understanding the function of the bleed air pressure gauge and the information it provides is critical for aircrew in maintaining safe operations.