Which bus is powered by the RAT?

The Remote Access Transmitter (RAT) is designed to provide hydraulic and electrical power in the event of an engine failure or other emergency scenarios. In the Dassault Falcon 7X, when the RAT is deployed, it supplies power to the essential buses, which are crucial for maintaining the basic functions of the aircraft's systems.

Specifically, when the RAT is activated, it powers both the Right and Left Essential Buses. This redundancy ensures that critical systems can continue to operate even if there is a total loss of other power sources. The function of the RAT is vital, especially during emergencies, to keep essential navigation and communication systems operational.

The Left Main Bus, on the other hand, does not directly receive power from the RAT. The same applies to the Left Essential Bus when the Bus Tie is closed; it does not exclusively rely on the RAT for power. Thus, the option that encompasses both the Right and Left Essential Buses being powered by the RAT is indeed the most accurate representation of its functionality.