What is the normal hydraulic system operating pressure for the yellow hydraulic system?

The normal hydraulic system operating pressure for the yellow hydraulic system on an A320 is indeed 3000 PSI. This pressure is standard for most hydraulic systems in commercial aircraft, designed to ensure sufficient force for various hydraulic actuators and systems involved in flight control surfaces, landing gear, and other critical mechanisms.

Maintaining a pressure of 3000 PSI allows the hydraulic system to operate efficiently and effectively under normal operating conditions. If the pressure were lower, the system might struggle to perform its functions, potentially compromising safety. Higher pressures would improve performance but also increase the risk of system failure and require more robust components to handle the excess pressure. Thus, the specified operating pressure of 3000 PSI strikes a balance between performance and safety for the yellow hydraulic system.