To what pressure does the RAT pressurize the blue hydraulic system?

The blue hydraulic system is pressurized by the Ram Air Turbine (RAT) at a pressure of 2500 PSI. This specific pressure is crucial for maintaining hydraulic functions during scenarios where normal hydraulic system pressure is lost, such as in an emergency descent or power failure. The RAT is designed to provide sufficient hydraulic pressure to power essential systems, ensuring the aircraft can maintain control and safety under such circumstances.

The other pressures listed are typically associated with different aircraft systems or configurations, which do not pertain to the RAT’s function in the A320’s blue hydraulic system. Understanding the specific role of the RAT in maintaining system pressure is key in emergency operations and highlights the importance of the blue system in overall aircraft control and safety.