Which hydraulic systems power the flaps?

The correct response indicates that the flaps on the C-17 are powered by hydraulic system 4. This system is specifically designated for operating not only the flaps but also other critical flight surfaces, ensuring the aircraft’s versatility and safety during different phases of flight.

Understanding the role of each hydraulic system is crucial, as different systems are responsible for powering various components throughout the aircraft. By designating a dedicated hydraulic system for flaps, engineers ensure that if other hydraulic systems encounter an issue, the flaps can still function correctly, which is critical for safe landing and takeoff operations. The separation of systems enhances redundancy and reliability within the aircraft’s flight control mechanisms, allowing pilots to have better control and responsiveness during maneuvers.