How many brake applications are available with accumulator pressure?

How many brake applications are available with accumulator pressure?

• A. 6
• B. 4
• C. 8
• D. 2

Answer: (A)

Brake accumulators store hydraulic energy to operate the brakes when the normal hydraulic source isn’t available. In the CRJ-550, the stored pressure provides a finite sequence of brake applications. Specifically, accumulator pressure supports six brake applications, after which the pressure falls below the level needed for reliable braking. This means you can decelerate or stop the airplane a limited number of times using only the energy stored in the accumulators until normal hydraulic pressure is restored by the aircraft’s pumps.

Brake accumulators store hydraulic energy to operate the brakes when the normal hydraulic source isn’t available. In the CRJ-550, the stored pressure provides a finite sequence of brake applications. Specifically, accumulator pressure supports six brake applications, after which the pressure falls below the level needed for reliable braking. This means you can decelerate or stop the airplane a limited number of times using only the energy stored in the accumulators until normal hydraulic pressure is restored by the aircraft’s pumps.