Which hydraulic system powers the outboard brakes?

Which hydraulic system powers the outboard brakes?

• A. Hydraulic System 1
• B. Hydraulic System 2
• C. Both Hydraulic System 1 and 2
• D. Neither powers the outboard brakes

Answer: (A)

Braking on aircraft is designed with two independent hydraulic circuits to keep you from losing all braking if one system fails. In this arrangement, the outboard brakes are fed by Hydraulic System 1. That means when you press the brake pedals, System 1 provides the pressure that actuates the outboard brakes, giving you braking action on those wheels even if the other system is unavailable. The other hydraulic system would power the remaining brakes, so overall redundancy is maintained. If the outboard brakes were powered by the other system or by both, you’d lose a level of reliability in a different failure scenario, which is why the shown configuration has the outboard brakes tied to System 1.

Braking on aircraft is designed with two independent hydraulic circuits to keep you from losing all braking if one system fails. In this arrangement, the outboard brakes are fed by Hydraulic System 1. That means when you press the brake pedals, System 1 provides the pressure that actuates the outboard brakes, giving you braking action on those wheels even if the other system is unavailable. The other hydraulic system would power the remaining brakes, so overall redundancy is maintained. If the outboard brakes were powered by the other system or by both, you’d lose a level of reliability in a different failure scenario, which is why the shown configuration has the outboard brakes tied to System 1.