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Yellow hydraulic pressure automatically takes ‐ over to supply the brakes.
‐ Antiskid and nosewheel steering remain available.
‐ 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.
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 3/12
FCOM 19 AUG 10
(2) BRAKES and ACCU PRESS indicator
Brake pressure is only indicated when the yellow hydraulic system controls the brake pressure,
which means when the :
‐ Alternate braking system is activated, or
‐ Parking brake is applied.
ACCU PRESS : Indicates the pressure in the yellow brake accumulator.
BRAKES : Indicates the yellow pressure delivered to the left and right brakes, as
measured upstream of the alternate servovalves.
AUTO BRK PANEL
Applicable to: ALL
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 4/12
FCOM 19 AUG 10
(3) AUTO/BRK panel
The springloaded MAX, MED, and LO pushbutton switches arm the appropriate deceleration
rate.
MAX ‐ mode is normally selected for takeoff.
If the pilot aborts the takeoff, maximum pressure goes to the brakes as soon as the system
generates the ground spoiler deployment order.
‐ MED or LO mode is normally selected for landing.
• LO mode sends progressive pressure to the brakes 4 s after the ground spoilers deploy in
order to decelerate the aircraft at 1.7 m/s² (5.6 ft/s²).
• MED mode sends progressive pressure to the brakes 2 s after the ground spoilers deploy
in order to decelerate the aircraft at 3 m/s² (9.8 ft/s²).
‐ Lights :
• The blue ON light comes on to indicate positive arming.
• The green DECEL light comes on when the actual deceleration is 80 % of the selected
rate.
Note: On slippery runway, the predetermined deceleration may not be reached due
to antiskid operation. In this case DECEL light will not illuminate. This does not
mean that autobrake is not working.
• Off : The indicated brake mode is not active.
BRK FAN
Applicable to: ALL
(4) BRK FAN pb sw
ON : The brake fans run if the lefthand main landing gear is down and locked.
OFF : The brake fans stop.
HOT lt : This amber light comes on when the brakes get too hot. (A caution appears on
ECAM, also).
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 5/12
FCOM 19 AUG 10
PEDESTAL
Applicable to: ALL
(1) PARKING BRK handle
Flight crew pulls this handle, then turns it clockwise, to apply the parking brake.
The ECAM memo page displays “PARK BRK”.
CAUTION If the pointer is not at ON, the parking brake is not on.
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 6/12
FCOM 19 AUG 10
ECAM WHEEL PAGE
Applicable to:
(1) : Release indicators
These green lines appear temporarily after the landing gear has been lowered to
indicate that the anti-skid function is ready.
They reappear after touchdown, along with REL (blue), when the anti-skid is active.
(2) : A/SKID
This legend appears in amber, along with an ECAM caution, in case of total BSCU
failure, or when the A/SKID & N/W STRG switch is OFF, or if the BSCU detects an
ANTI-SKID failure.
(3) : AUTO BRK
This legend appears :
‐ in green when auto brake is armed,
‐ flashing green for 10 s after autobrake disengagement.
‐ in amber, along with an ECAM caution, to indicate a system failure.
MED, LO, or MAX appears underneath in green to show which rate has been selected.
(4) : Wheel number
This white number identifies individual wheels of the main landing gear.
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 7/12
FCOM 19 AUG 10
(5) : Brake temperature
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 4(10)
