If slat travel stops, will the flaps continue to their selected position?

• A. Yes, True
• B. No, they stop with slats
• C. Only if commanded separately
• D. Uncertain

Answer: (A)

Flaps and slats are typically driven by separate hydraulic circuits with independent position feedback. Slats are leading-edge devices, while flaps are on the trailing edge; they respond to their own commands and stops. If the slats reach a travel limit, that just ends their motion. It does not automatically prevent the flap system from reaching its commanded position. As long as the flap actuators are powered and a flap position is commanded, the flaps will continue to move to that setting until they reach their own limit or a fault occurs. So, they will proceed to the selected flap position even if slats have stopped.