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Brake Pedal Transmitter Unit
Brake Belts (optional)
TMULDBXZZ LEVEL 3
EFFECTIVITY 32-42-00 Page 1
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 187
ALL
NORMAL BRAKING COMPONENTS
BSCU
IDENTIFICATION
FIN: 10GG
LOCATION
ZONE: 122, Rack 94VU
DESCRIPTION
The Braking and Steering Control Unit (BSCU) consists
of:
- four power supply units grouped two by two,
- two identical sets of three boards which form
systems 1 and 2, each board is connected to an
On-Board Reprogrammable Module (OBRM),
- a rear interface in the form of two
U-shaped boards (around the connector)
comprises the lightning protection and the
switching assemblies.
TMULDBXZZ-T01 LEVEL 3
EFFECTIVITY 32-42-00 Page 2
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 188
ALL
NORMAL BRAKING COMPONENTS - BSCU
TMULDBXZZ-P01 LEVEL 3
EFFECTIVITY 32-42-00 Page 3
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 189
ALL
NORMAL BRAKING COMPONENTS
BRAKE SELECTOR VALVE
IDENTIFICATION
FIN: 23GG
LOCATION
ZONE: 146
DESCRIPTION
The selector valve directs normal hydraulic pressure
(green system) through the automatic selector to the
normal brake servovalve manifold.
It is energized for normal braking purposes.
FILTER
IDENTIFICATION
FIN: 2584GM
LOCATION
ZONE: 146
DESCRIPTION
A filter with a filtering capability of 15 microns
absolute is installed between the delivery port of the
selector valve and the automatic selector.
The purpose of this filter is to protect the supply
of the normal servovalves downstream of the selector
valve.
TMULDBXZZ-T02 LEVEL 3
EFFECTIVITY 32-42-00 Page 4
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 190
ALL
NORMAL BRAKING COMPONENTS - BRAKE SELECTOR VALVE - FILTER
TMULDBXZZ-P02 LEVEL 3
EFFECTIVITY 32-42-00 Page 5
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 191
ALL
NORMAL BRAKING COMPONENTS
AUTOMATIC SELECTOR
IDENTIFICATION
FIN: 2576GM
LOCATION
ZONE: 148
DESCRIPTION
The automatic selector supplies the brake system with
either the green (normal braking) or yellow (alternate
braking/parking brake) pressure.
Under normal operating conditions it allows the green
hydraulic fluid to flow to the brakes and maintains
the yellow hydraulic pressure on standby status.
Should the green pressure drop below a predetermined
value, the selector automatically cuts off the green
supply and opens the passage to the yellow pressure.
In addition, it shuts off the yellow system from the
return line for parking brake application.
TMULDBXZZ-T03 LEVEL 3
EFFECTIVITY 32-42-00 Page 6
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 192
ALL
TMULDBXZZ-P03 LEVEL 3
NORMAL BRAKING COMPONENTS - AUTOMATIC SELECTOR
EFFECTIVITY 32-42-00 Page 7
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 193
ALL
NORMAL BRAKING COMPONENTS
AUTOMATIC SELECTOR (CONTINUED)
CROSS SECTION
The automatic selector includes a primary stage which
selects the system.
It also includes a secondary stage used to cut off the
return from the servovalves of the alternate system.
TMULDBXZZ-T04 LEVEL 3
EFFECTIVITY 32-42-00 Page 8
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 194
ALL
NORMAL BRAKING COMPONENTS - AUTOMATIC SELECTOR CROSS SECTION
TMULDBXZZ-P04 LEVEL 3
EFFECTIVITY 32-42-00 Page 9
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 195
ALL
NORMAL BRAKING COMPONENTS
THROTTLE VALVE
IDENTIFICATION
FIN: 2581GM
LOCATION
ZONE: 148
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