With one hydraulic system inoperative, the flaps ___________.

With one hydraulic system inoperative, the flaps ___________.

• A. Operates at full speed
• B. Operate at half speed
• C. Does not move
• D. Retract

Answer: (B)

Redundancy in the hydraulic system means the flaps can still move even if one system fails, but the speed of movement depends on the available hydraulic flow. The flap actuators rely on hydraulic power, and when one source is inoperative, the remaining source provides less flow than normal. With less flow available, the actuators move more slowly, typically about half the normal rate. Therefore, the flaps operate at half speed. They still extend or retract as commanded, just more slowly, rather than stopping or moving at full speed.

Redundancy in the hydraulic system means the flaps can still move even if one system fails, but the speed of movement depends on the available hydraulic flow. The flap actuators rely on hydraulic power, and when one source is inoperative, the remaining source provides less flow than normal. With less flow available, the actuators move more slowly, typically about half the normal rate. Therefore, the flaps operate at half speed. They still extend or retract as commanded, just more slowly, rather than stopping or moving at full speed.