What does the RAT MAN ON switch do?

The RAT MAN ON switch is crucial for deploying the Ram Air Turbine (RAT) and ensuring that the blue hydraulic system is pressurized. When activated, this switch performs two critical functions: it extends the RAT and simultaneously provides pressurization to the blue hydraulic system, which can be essential for maintaining control of the aircraft and ensuring that certain systems remain operational during an emergency scenario.

The RAT is a backup system used in cases where the normal hydraulic power sources are lost, providing the necessary hydraulic pressure to operate items such as the flight controls and landing gear. By extending the RAT and pressurizing the blue system when the RAT MAN ON switch is activated, flight crews can maintain aircraft control and functionality until other systems are restored or the situation is stabilized.

Understanding the operation of the RAT and its accompanying switch is vital for efficient emergency management, highlighting the importance of the RAT MAN ON switch in facilitating a swift recovery from hydraulic system failures.