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‐ Hydraulically (Y + G system low pressure, the brakes are supplied by the brake accumulator
only).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
BRAKES AND ANTISKID - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-30-10 P 12/16
FCOM 19 AUG 10
Depending on the brake pedals’ demand, the ABCU controls the alternate brake selector and the
alternate servovalves.
Brake pressure and accumulator pressure are indicated on a triple indicator, located on the center
instrument panel.
To avoid wheel locking and limit the risk of tire burst, brake pressure is automatically limited to
1 000 PSI.
Accumulators are designed to supply at least seven full brake applications.
Applicable to:
PARKING BRAKE
Brakes are supplied by the yellow hydraulic system, or by accumulator via the dual shuttle valves.
Alternate servo valves open allowing full pressure application.
The accumulator maintains the parking pressure for at least 12 h.
If the parking brake is activated and no yellow hydraulic or accumulator brake pressure is
available, then the normal braking system can be applied via the brake pedals.
Yellow accumulators can be pressurized by pressing the yellow electrical pump switch.
Brake pressure indications are available on a triple indicator.
Applicable to:
,
,
MSN,,
4538,,
PARKING BRAKE
Brakes are supplied by the yellow hydraulic system, or by accumulator pressure via the parking
brake control valve, which opens allowing full pressure application on the main gear wheel brakes.
The accumulator maintains the parking pressure for at least 12 h.
If the parking brake is activated and no yellow hydraulic or accumulator brake pressure is
available, then the normal braking system can be applied via the brake pedals.
Yellow accumulators can be pressurized by pressing the yellow electrical pump switch.
Brake pressure and accumulator pressure are indicated on a triple indicator, located on the center
instrument panel.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
BRAKES AND ANTISKID - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-30-10 P 13/16
FCOM 19 AUG 10
BRAKING SCHEMATIC
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
BRAKES AND ANTISKID - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-30-10 P 14/16
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
BRAKES AND ANTISKID - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-30-10 P 15/16
FCOM 19 AUG 10
BRAKING SCHEMATIC
Applicable to:
,
,
MSN,,
4538,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
BRAKES AND ANTISKID - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-30-10 P 16/16
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
BRAKES AND ANTISKID - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-32-30-20 P 1/12
FCOM 19 AUG 10
CENTER INSTRUMENT PANEL
Applicable to:
(1) A/SKID & N/W STRG switch
ON : If green hydraulic pressure is available :
‐ Antiskid is available.
‐ Nosewheel steering is available.
If green hydraulic pressure is lost, then :
‐ Yellow hydraulic pressure automatically takes over to supply the brakes.
‐ Antiskid remains available.
‐ Nosewheel steering is lost.
‐ The triple indicator shows yellow system brake pressure.
OFF : The yellow hydraulic system supplies pressure to the brakes.
‐ Antiskid is deactivated. The pilot must refer to the triple indicator to limit brake
pressure and avoid locking a wheel.
‐ Nosewheel steering is lost.
‐ Differential braking remains available through the pedals.
‐ The triple indicator displays yellow system brake pressure.
(2) BRAKES and ACCU PRESS indicator
ACCU PRESS : Indicates the pressure in the yellow brake accumulator.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
BRAKES AND ANTISKID - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-32-30-20 P 2/12
FCOM 19 AUG 10
BRAKES : Indicates the yellow pressure delivered to the left and right brakes, as
measured upstream of the alternate servovalves.
CENTER INSTRUMENT PANEL
Applicable to:
,
,
MSN,,
4538,,
(1) A/SKID & N/W STRG sw
ON : If green hydraulic pressure is available, then antiskid is available.
If green hydraulic pressure is lost, then :
　
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