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LOCATION
ZONE: 122
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
the 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.
HANDWHEEL TRANSMITTER UNIT
IDENTIFICATION
FIN: 1GC, 2GC
LOCATION
ZONE: 211, 212
DESCRIPTION
Each handwheel activates a transmitter unit with
4 potentiometers.
In addition, it includes a pushbutton switch for the
disconnection of the nose wheel steering control
through the rudder pedals.
TMULDLX02-T01 LEVEL 3
EFFECTIVITY 32-51-00 Page 2
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 278
ALL
NOSE WHEEL STEERING SYSTEM COMPONENTS - BSCU - HANDWHEEL TRANSMITTER UNIT
TMULDLX02-P01 LEVEL 3
EFFECTIVITY 32-51-00 Page 3
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 279
ALL
NOSE WHEEL STEERING SYSTEM COMPONENTS
FEEDBACK SENSORS
IDENTIFICATION
FIN: 3GC, 4GC
LOCATION
ZONE: 711
DESCRIPTION
The nose wheel steering feedback sensor is of the
Rotary Variable Differential Transducer (RVDT) type.
It consists of a reduction gearbox and a sensor box.
The sensor box transmits the rotating tube position
to the sensor box which sends information to the BSCU
for steering position monitoring.
The knob, with an internal lockpin, locks the gearbox
in the neutral position (0 degree) before installation
of the sensor box.
HYDRAULIC CONTROL UNIT
IDENTIFICATION
FIN: 6GC
LOCATION
ZONE: 711
DESCRIPTION
The hydraulic control unit mainly consists of:
- a selector valve,
- a servovalve,
- an accumulator,
- a filter and valves.
It is hydraulically supplied from the nose landing
gear doors close line, through the rotating joint, and
electrically connected to the BSCU.
It supplies the steering cylinders according to the
electrical signals.
TMULDLX02-T02 LEVEL 3
EFFECTIVITY 32-51-00 Page 4
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 280
ALL
NOSE WHEEL STEERING SYSTEM COMPONENTS - FEEDBACK SENSORS - HYDRAULIC CONTROL UNIT
TMULDLX02-P02 LEVEL 3
EFFECTIVITY 32-51-00 Page 5
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 281
ALL
NOSE WHEEL STEERING SYSTEM COMPONENTS
ROTATING JOINT
IDENTIFICATION
FIN:2526GM (NLG LEG ASSY)
LOCATION
ZONE: 711
DESCRIPTION
The rotating joint mainly consists of:
- a fixed part fitted with a liner and a lever
for the attachment to the aircraft structure,
- a moving part fitted with a shaft and a plate
for the attachment to the NLG leg hinge pin.
It supplies the steering hydraulic control unit when
the leg is downlocked and stops the fluid flow when
the leg is in another position.
TMULDLX02-T03 LEVEL 3
EFFECTIVITY 32-51-00 Page 6
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 282
ALL
NOSE WHEEL STEERING SYSTEM COMPONENTS - ROTATING JOINT
TMULDLX02-P03 LEVEL 3
EFFECTIVITY 32-51-00 Page 7
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 283
ALL
THIS PAGE INTENTIONALLY LEFT BLANK
TMULDLX02 LEVEL 3
EFFECTIVITY 32-51-00 Page 8
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 284
ALL
32 - LANDING GEAR
32-42-00 BRAKING AND STEERING - BSCU
CONTROL INTERFACES
CONTENTS:
ADIRUs
SECs
LGCIUs
ELACs
BTMUs
Tachometers
LGCIUs
Pack Controllers
TMULDGV0C LEVEL 3
EFFECTIVITY 32-42-00 Page 1
Dec 31/94
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 285
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