What should be checked regarding hydraulics during preflight?

What should be checked regarding hydraulics during preflight?

• A. Cabin air quality and temperature.
• B. Fluid levels, leaks, and system pressures as per the QRH/airline procedures.
• C. Hydraulic fluid color only.
• D. Battery state of charge.

Answer: (B)

Hydraulic readiness comes from confirming three things: fluid quantity, absence of leaks, and proper system pressures. In preflight, checking fluid levels ensures there’s enough hydraulic fluid for the system to operate and helps catch signs of a leak or improper maintenance. Inspecting for leaks around accessible lines, fittings, and reservoirs is crucial because even small leaks can lead to loss of hydraulic power before takeoff. Verifying system pressures—by looking at gauge indicators or panel readings—confirms the pumps are delivering the expected pressure to the actuators and that there’s no blockage or pump issue. These checks are performed according to the QRH or airline procedures, which specify the acceptable pressure ranges and any corrective actions if readings are outside limits. The other options don’t fit because fluid color alone doesn’t reflect level or contamination, cabin air quality and temperature aren’t related to hydraulic health, and battery state of charge has no bearing on hydraulic readiness.

Hydraulic readiness comes from confirming three things: fluid quantity, absence of leaks, and proper system pressures. In preflight, checking fluid levels ensures there’s enough hydraulic fluid for the system to operate and helps catch signs of a leak or improper maintenance. Inspecting for leaks around accessible lines, fittings, and reservoirs is crucial because even small leaks can lead to loss of hydraulic power before takeoff. Verifying system pressures—by looking at gauge indicators or panel readings—confirms the pumps are delivering the expected pressure to the actuators and that there’s no blockage or pump issue. These checks are performed according to the QRH or airline procedures, which specify the acceptable pressure ranges and any corrective actions if readings are outside limits. The other options don’t fit because fluid color alone doesn’t reflect level or contamination, cabin air quality and temperature aren’t related to hydraulic health, and battery state of charge has no bearing on hydraulic readiness.