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TMULDZ101-T03 LEVEL 1
EFFECTIVITY
ALL 32-40-00 Page 6
Feb 29/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 142
ALL
BRAKE SYSTEM PRESENTATION - INFLIGHT BRAKING
TMULDZ101-P03 LEVEL 1
EFFECTIVITY
ALL 32-40-00 Page 7
Feb 29/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 143
ALL
WHEELS AND BRAKES - BRAKE SYSTEM PRESENTATION
PARKING BRAKE
The parking brake system is hydraulically supplied
either by yellow high pressure or by an accumulator
of 12 hours autonomy.
The system needs either DC ground/flight bus or hot
bus 1 electrical supply and uses segregated wiring
routes.
When the parking brake system is activated, all other
braking modes become electrically and hydraulically
inoperative.
Note that, as normal braking and auxiliary low pressure
control systems are not available, an ultimate
emergency braking can be ensured by means of the
parking brake system.
PARKING BRAKE ON
When the parking brake handle is lifted and turned to
"ON", the parking brake control valve is energized.
The BSCU is informed that the parking brake system is
on, which deactivates the other braking modes.
Yellow pressure passes through the parking brake
control valve and reaches the dual shuttle valve.
The dual shuttle valve moves, allowing alternate system
circuit to be supplied by the parking brake system.
Brakes are supplied through the normally open alternate
servovalves.
The pressure delivered to the left hand and right hand
brakes as well as the brake accumulator pressure are
indicated on the yellow pressure triple indicator.
PARKING BRAKE OFF
When the parking brake handle is lifted and turned to
"OFF", the parking brake control valve is energized
on the opposite way, the parking brake is reset and
all the other braking modes are restored.
The yellow brake accumulator can be pressurized by
pressing the yellow electrical pump pushbutton switch.
TMULDZ101-T04 LEVEL 1
EFFECTIVITY
ALL 32-40-00 Page 8
Feb 29/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 144
ALL
BRAKE SYSTEM PRESENTATION - PARKING BRAKE
TMULDZ101-P04 LEVEL 1
EFFECTIVITY
ALL 32-40-00 Page 9
Feb 29/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 145
ALL
WHEELS AND BRAKES - BRAKE SYSTEM PRESENTATION
ALTERNATE BRAKING WITH ANTI-SKID
The alternate braking with anti-skid associates the
yellow high pressure with the anti-skid regulation.
This mode is automatically obtained :
- in case of green pressure loss,
- if a failure occurs on the normal braking system
during operation or BSCU BITE test.
As the normal system becomes inoperative, the alternate
braking circuit is pressurized through the automatic
selector.
Orders are entered by the pedals and transmitted
through an auxiliary low pressure control system to
the dual valve.
The dual valve regulates the yellow braking pressure.
The BSCU ensures the anti-skid regulation by
controlling the normally open alternate servovalves.
The braking pressure is read on the ACCU/PRESS triple
indicator.
TMULDZ101-T05 LEVEL 1
EFFECTIVITY
ALL 32-40-00 Page 10
Feb 29/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 146
ALL
BRAKE SYSTEM PRESENTATION - ALTERNATE BRAKING WITH ANTI-SKID
TMULDZ101-P05 LEVEL 1
EFFECTIVITY
ALL 32-40-00 Page 11
Feb 29/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 147
ALL
WHEELS AND BRAKES - BRAKE SYSTEM PRESENTATION
ALTERNATE BRAKING WITHOUT ANTI-SKID
Alternate braking without anti-skid is different from
alternate braking with anti-skid in that there is no
anti-skid regulation.
The anti-skid regulation can be disconnected :
- either electrically (A/SKID & N/W STRG switch
set to "OFF" or power supply failure),
- or hydraulically if the brake yellow pressure
accumulator only supplies the brakes.
Brake pressure has to be limited by the pilot to avoid
wheel locking using ACCU/PRESS triple indicator.
　
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