During ADG deployment, which source powers hydraulic pump 3B?

During ADG deployment, which source powers hydraulic pump 3B?

• A. ADG Bus
• B. AC Bus 1
• C. Battery Bus
• D. External Power

Answer: (A)

During ADG deployment, the electrical power needed for essential systems comes from the Air Driven Generator and its dedicated ADG Bus. Hydraulic pump 3B is wired to that bus, so when the ADG is supplying power, it can drive pump 3B to maintain hydraulic pressure for the flight controls even if the main generators and external power are unavailable. Other power sources like external power, AC Bus 1, or the Battery Bus aren’t used to run this pump during ADG operation, as the system is designed to rely on the ADG outputs to keep critical hydraulics powered in an electrical emergency.

During ADG deployment, the electrical power needed for essential systems comes from the Air Driven Generator and its dedicated ADG Bus. Hydraulic pump 3B is wired to that bus, so when the ADG is supplying power, it can drive pump 3B to maintain hydraulic pressure for the flight controls even if the main generators and external power are unavailable. Other power sources like external power, AC Bus 1, or the Battery Bus aren’t used to run this pump during ADG operation, as the system is designed to rely on the ADG outputs to keep critical hydraulics powered in an electrical emergency.