How will the flaps/slats be affected if they are running off the ADG?

How will the flaps/slats be affected if they are running off the ADG?

• A. 1/2 speed
• B. Full speed
• C. 1/4 speed
• D. Adaptive speed

Answer: (A)

When the flaps or slats are powered by the ADG, the available power is limited compared with the normal system. To avoid overloading the emergency source and to maintain controllability with that restricted power, the high-lift devices operate at a reduced rate. That means they move at about half their normal speed, preventing excessive demand on the ADG’s limited hydraulic/electrical capability. The other speeds would either require more power than the ADG can reliably supply or would be impractically slow, which isn’t how the emergency system is intended to work.

When the flaps or slats are powered by the ADG, the available power is limited compared with the normal system. To avoid overloading the emergency source and to maintain controllability with that restricted power, the high-lift devices operate at a reduced rate. That means they move at about half their normal speed, preventing excessive demand on the ADG’s limited hydraulic/electrical capability. The other speeds would either require more power than the ADG can reliably supply or would be impractically slow, which isn’t how the emergency system is intended to work.