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UF94200
EFFECTIVITY Page 14
ALL
LANDING GEAR RETRACTION/EXTENSION PRESENTATION (PRINCIPLE)
TMULDGD05-P01 LEVEL 1
EFFECTIVITY 32-30-00 Page 3
Nov 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 15
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LANDING GEAR RETRACTION/EXTENSION PRESENTATION
NORMAL RETRACTION
At this stage of the operation, the landing gear is
down and locked.
The aircraft is in flight configuration.
Landing Gear Control and Interface Unit 1 is in
command.
Landing Gear Control and Interface Unit 2 is in
standby.
At each gear UP selection, there is a changeover from
LGCIU 1 to LGCIU 2 (or vice versa).
Landing gear retraction cycle :
- DOORS OPEN.
- GEAR RETRACTS : When all hydraulic operated
doors are fully open, the
landing gear is controlled to
retract.
- DOORS CLOSE : When all the landing gear is
locked up, the doors are
controlled to close.
The hydraulic supply to the landing gear circuit is
automatically cut off by a safety valve above 260
knots.
TMULDGD05-T02 LEVEL 1
EFFECTIVITY 32-30-00 Page 4
Nov 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 16
ALL
TMULDGD05-P02 LEVEL 1
LANDING GEAR RETRACTION/EXTENSION PRESENTATION (NORMAL RETRACTION)
EFFECTIVITY 32-30-00 Page 5
Nov 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 17
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LANDING GEAR RETRACTION/EXTENSION PRESENTATION
NORMAL EXTENSION
All gears are retracted and uplocked, all doors are
closed and uplocked and the safety valve is closed.
At each gear DOWN selection, the safety valve opens
and the LGCIU in command controls the extension
sequence.
Landing gear extension cycle :
- DOORS OPEN.
- GEAR EXTENDS : When all hydraulic operated
doors are fully open, the
landing gear is controlled to
extend.
- DOORS CLOSE : When all the landing gear is
locked down, the doors are
controlled to close.
TMULDGD05-T03 LEVEL 1
EFFECTIVITY 32-30-00 Page 6
Nov 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 18
ALL
TMULDGD05-P03 LEVEL 1
LANDING GEAR RETRACTION/EXTENSION PRESENTATION (NORMAL EXTENSION)
EFFECTIVITY 32-30-00 Page 7
Nov 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 19
ALL
LANDING GEAR RETRACTION/EXTENSION PRESENTATION
FREE FALL EXTENSION
Rotation of the handle closes the cut out valve and
connects all landing gear hydraulic components to the
return line, and releases door and gear uplocks.
The doors stay open. The main landing gear is locked
down by spring forces. The nose landing gear is locked
down by aerodynamic forces.
Then the landing gear lever must be set to down in
order to switch off the UNLK lights.
NOTE : As the landing gear system is depressurized and
the nose landing gear doors stay open, the nose
wheel steering is lost.
TMULDGD05-T04 LEVEL 1
EFFECTIVITY 32-30-00 Page 8
Nov 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 20
ALL
LANDING GEAR RETRACTION/EXTENSION PRESENTATION (FREE FALL EXTENSION)
TMULDGD05-P04 LEVEL 1
EFFECTIVITY 32-30-00 Page 9
Nov 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 21
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SELF EXAMINATION
What controls the landing gear normal operating
sequence ?
A - Either LGCIU in turn.
B - Both LGCIUs simultaneously.
C - The crank handle.
Which unit gives the landing gear position to ECAM
display ?
A - Either LGCIU in turn.
B - Both LGCIUs simultaneously.
C - LGCIU 1 only.
When does the automatic changeover of the LGCIUs in
control occur?
A - When "DOWN" is selected.
B - When "UP" is selected.
C - When the first engine starts.
TMULDGD05 LEVEL 1
EFFECTIVITY 32-30-00 Page 10
Nov 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
UF94200
EFFECTIVITY Page 22
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32 - LANDING GEAR
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