What does the term 'standby hydraulic system' refer to?

The term 'standby hydraulic system' specifically refers to a backup system that activates during primary failure. In hydraulic systems, particularly in aerospace applications, reliance on a single hydraulic source can be risky. A standby hydraulic system ensures that if the primary hydraulic system fails due to a leak, component failure, or any other malfunction, the standby system kicks in to maintain functionality and safety. This ensures that critical operations, such as flight controls or landing gear mechanisms, can continue to operate effectively even under failure conditions. This redundancy is crucial for enhancing the safety and reliability of hydraulic systems used in aircraft and other machinery.