Which components does the utility hydraulic system normally supply hydraulic power to?

• A. Anti-Skid, Wing Flaps, Main Landing Gear, Nose Landing Gear, Normal Brakes, Nosewheel Steering, and half of the hydraulic power used to operate the aileron, rudder and elevator
• B. Propulsion system
• C. Cabin pressurization
• D. Fuel control units

Answer: (A)

Understanding how hydraulic power is distributed helps explain why the utility hydraulic system powers those items. This system is designed to drive components that need reliable pressure but can share or be backed up by other systems for redundancy. It typically provides hydraulic power to anti-skid braking, wing flaps, main landing gear, nose landing gear, and nosewheel steering, as well as normal brakes. It also supplies part of the actuation power for the primary flight controls (ailerons, rudder, and elevator), with the remaining power supplied by the other hydraulic systems to ensure full control even if one system is unavailable. Items like propulsion, cabin pressurization, and fuel control units are not normally powered by the utility hydraulic system.