Landing Gear Normal Brakes Alternate Brakes Reserve Brakes & Steering Brake Accumulator Autobrakes Parking Brake Brake Units Tyre Serviceability Schematics EICAS Messages

Reserve Brakes & Steering

Reserve Brakes and Steering. Alternate Brakes Hydraulic Driven Generator (Operates if both AB busbars failed) Landing Gear Landing Gear Tailskid Flaps and Slats - Normal System Operation Nosewheel Steering Remaining Centre System Flight Controls Ram Air Turbine Ram Air Turbine

Reserve Brakes And Steering Switch. The reserve brakes and steering system provides nose wheel steering power with a loss of Centre Hydraulic pressure, or brakes and nose wheel steering power with a loss of both Centre Hydraulic and Right Hydraulic pressures. The reserve system pressurises the alternate brake system.

Pressing the RESERVE BRAKES switch provides reserve hydraulic fluid to the right system electric pump. The pump is isolated from the other right system components so that pump pressure is then supplied exclusively to the Normal Brakes system. The BRAKE SOURCE light extinguishes when pressure is available.

The BRAKE SOURCE light illuminates and the EICAS advisory message BRAKE SOURCE displays if both the normal and the alternate brake system pressures are low. The light extinguishes if the Reserve Brakes and Steering system is selected and pressure is available. If the BRAKE SOURCE Light remains illuminated, the Brake Accumulator is the only source of power to the brakes.

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