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mechanism. The sensors supply main landing gear downlock
position to the landing gear position indicating and warning
system.
Location
There is one main gear downlock sensor on each side of the
upper link of the downlock mechanism.
There is one target on each side of the lower link of the
downlock mechanism.
The sensor identification placards on the downlock mechanism
upper link show the sensor number. These are the main landing
gear downlock sensor numbers:
Sensor Number MLG Location
S0071 Left Forward
S0073 Right Forward
S0301 Right Aft
S0302 Left Aft
Functional Description
The targets move near the sensors when the downlock
mechanism moves to the down and locked position. This
sends signals to the landing gear position indicating and
warning system in the PSEU when the main landing gear is
down and locked.
The sensor wire connections are at two electrical connectors,
forward and aft of the reaction link near the downlock
mechanism upper link.
LG POSITION INDICATING AND WARNING SYSTEM - MAIN GEAR DOWNLOCK SENSOR
EFFECTIVITY
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32-61-00-004
LG POSITION INDICATING AND WARNING SYSTEM - MAIN GEAR DOWNLOCK SENSOR
LG POSITION INDICATING AND WARNING SYSTEM - MAIN GEAR DOWNLOCK SENSOR
EFFECTIVITY
GUN ALL 32-61-00
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Purpose
There are two nose gear up/down lock sensors on the lock link
of the nose landing gear. They supply lock position to the
landing gear position indicating and warning system.
Location
Two sensors are on the top of the aft lock link.
Two targets are on the top of the forward lock link.
The sensor identification placards, above the sensor on the
uplock mechanism frame assembly, show the sensor number.
These are the MLG up and locked sensor numbers:
Sensor Number Location
S0846 Left
S0854 Right
Two junctions boxes, one on each side wall aft in the nose
landing gear wheel well, contain the wire connections for each
of the lock sensors.
Functional Description
The targets move near the sensors when the lock link moves to
the locked position. The lock link moves to the locked position
when the nose landing gear is down and locked, and up and
locked. This sends signals to the position indicating system in
the PSEU when the nose landing gear is locked.
LG POSITION INDICATING AND WARNING SYSTEM - NOSE GEAR UP/DOWN LOCK SENSOR
EFFECTIVITY
GUN ALL 32-61-00
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-61-00-005
LG POSITION INDICATING AND WARNING SYSTEM - NOSE GEAR UP/DOWN LOCK SENSOR
LG POSITION INDICATING AND WARNING SYSTEM - NOSE GEAR UP/DOWN LOCK SENSOR
EFFECTIVITY
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-61-00-005
Purpose
There are two nose gear down sensors on the ceiling of the
nose landing gear wheel well. They supply nose landing gear
down position to the landing gear position indicating and
warning system.
Location
Two down sensors are on the ceiling of the nose landing gear
wheel well.
There is one target on each side of the top of the upper drag
brace.
The sensor identification placards, on the forward side of the
sensor brackets, show the sensor number. These are the NLG
down sensor numbers:
Sensor Number Location
S0845 Left
S0853 Right
Two junction boxes, one for each sensor on the side wall in the
nose landing gear wheel well, contain the sensor wire
connections.
Functional Description
The targets move near the sensors when the drag brace moves
to the down position. This sends signals to the position
indicating system in the PSEU when the nose landing gear is
in the down position.
LG POSITION INDICATING AND WARNING SYSTEM - NOSE GEAR DOWN SENSOR
EFFECTIVITY
GUN ALL 32-61-00
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-61-00-006
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