What is the function of the A1/A2/B2/B3/C2 switches on the Overhead Panel?

The A1/A2/B2/B3/C2 switches on the Overhead Panel of the Dassault Falcon 7X function to close the respective hydraulic shutoff valves. Each switch corresponds to a specific hydraulic system and is designed to control the flow of hydraulic fluid, ensuring that the respective hydraulic system can be isolated as needed for maintenance, safety, or to manage system failures.

When the switch is activated, it effectively interrupts the hydraulic flow, which is crucial during situations where hydraulic power needs to be managed carefully, such as in the event of a leak or failure within the system. This ability to isolate hydraulic systems is an important feature for the overall safety and functionality of the aircraft.

Options related to opening hydraulic shutoff valves or activating engine start sequences do not accurately describe the primary function of these switches. Furthermore, disconnecting electrical power from avionics pertains to a different system entirely and does not relate to the management of hydraulic systems. Consequently, the function associated with closing the hydraulic shutoff valve is the accurate description of the switches’ purpose on the Overhead Panel.