With a flap protection system using a hydraulic flap circuit, what happens when the flap lever is moved down while well above the flap extension speed?

• A. Flaps extend normally
• B. Flaps remain up because they are hydraulically locked
• C. Flaps extend to full down
• D. Flaps automatically retract

Answer: (B)

The flap protection system prevents flap extension when airspeed is higher than the safe extension limit. In a hydraulic flap circuit, reaching a speed well above that limit triggers a protective interlock that hydraulically locks the flap actuators, keeping the flaps in the retracted (up) position. So, even though the lever is moved down, the hydraulic lock stops any extension, and the flaps remain up. This protection avoids deploying flaps at speeds that could cause damage or instability.