In AUTO mode, besides the AC generator being online, what condition must be met for the pump to start?

• A. Nose gear deployed
• B. Flaps are out of the zero degree detent
• C. Hydraulic reservoir at full
• D. Antiskid engaged

Answer: (B)

Automatic hydraulic pump start is driven by demand. When AC power is available, the system will only start the hydraulic pump if there’s a hydraulic load to supply. Extending or retracting flaps from the zero detent creates a hydraulic load, so the pump starts to provide pressure for those actuators. If the flaps stay at zero, there’s no hydraulic demand and the pump remains off to conserve power. The other factors—nose gear deployment, hydraulic reservoir being full, or antiskid status—do not determine the auto-start condition in this context.