Which statement correctly describes the brake accumulator pressure range?

• A. 2700 psi to 3400 psi
• B. 2800 psi to 3500 psi
• C. 2900 psi to 3600 psi
• D. 3000 psi to 3700 psi

Answer: (B)

Brake accumulators store hydraulic energy to deliver immediate brake pressure, especially as you press the pedal or during rapid brake demand. Keeping the accumulator pressure within a defined window ensures you have enough stored energy to apply the brakes reliably while staying within the system’s component limits.

If the pressure is too low, braking response can be weak and the anti-skid system may not activate properly because there isn’t enough pressure available for the number of brake applications expected. If the pressure is too high, components such as seals, hoses, and the gas-charge mechanism can be overstressed, increasing the risk of leakage or system faults and reducing overall braking reliability.

The specified window for the brake accumulator in this aircraft is 2800 to 3500 psi, which provides a safe, effective balance between having sufficient stored energy for braking and protecting the hydraulic system from overpressure.