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EFFECTIVITY
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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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
32-61-00-001
LG POSITION INDICATING AND WARNING SYSTEM - INTRODUCTION
LG POSITION INDICATING AND WARNING SYSTEM - INTRODUCTION
EFFECTIVITY
GUN ALL 32-61-00
Page 3
D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-61-00-001
Purpose
The position lights show the pilots the condition of the landing
gear.
The control lever position switches provides a signal to the
position indicating and warning system when the landing gear
lever moves to the down position.
Location
The primary position lights are on the landing gear panel on the
P2 center instrument panel, above the landing gear lever.
The auxiliary position lights are on the P5 aft overhead panel.
The control lever position switches are on the landing gear
panel on the P2 center instrument panel in the flight
compartment.
Functional Description
The green primary and auxiliary position lights come on when
the landing gear moves to the down and locked position.
The red primary position lights come on when the position of
the control lever is not the same as the position of the landing
gear. The red lights also come on for the visual gear not down
warning.
There is a switch actuation cam on the forward end of the
control lever. The cam moves the control lever position
switches to the closed position when the landing gear lever
moves to the down (DN) position.
The control lever switches are in the open position when the
landing gear lever is in the UP and OFF positions.
One control lever down position switch sends a landing gear
control lever down position signal to the PSEU.
The other landing gear control lever down position switch
provides a ground for the no smoking sign relay.
See the passenger compartment passenger signs system for
more information about the no smoking sing relay.
(SECTION 33-25)
LG POSITION INDICATING AND WARNING SYSTEM - POSITION LIGHTS, LEVER POSITION SWITCHES
EFFECTIVITY
GUN ALL 32-61-00
Page 4
D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-61-00-002
LG POSITION INDICATING AND WARNING SYSTEM - POSITION LIGHTS, LEVER POSITION SWITCHES
LG POSITION INDICATING AND WARNING SYSTEM - POSITION LIGHTS, LEVER POSITION SWITCHES
EFFECTIVITY
GUN ALL 32-61-00
Page 5
D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-61-00-002
Purpose
There are two main gear up and locked sensors on each main
landing gear uplock mechanism. They send main gear up and
locked information to the landing gear position indicating and
warning system.
Location
The sensors are on the forward and aft sides of the MLG uplock
mechanism.
The targets are also on the uplock mechanism and move with
the uplock hook.
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 MLG Location
S0072 Left Forward
S1016 Left Aft
S0074 Right Forward
S1017 Right Aft
Functional Description
The targets are near the sensors when the uplock mechanism
moves to the uplock position. This sends signals to the position
indicating system in the proximity switch electronics unit (PSEU)
when the main landing gear is up and locked.
The sensor wire connections are in wire splices near the uplock
mechanism.
LG POSITION INDICATING AND WARNING SYSTEM - MAIN GEAR UP AND LOCKED SENSOR
EFFECTIVITY
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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
32-61-00-003
LG POSITION INDICATING AND WARNING SYSTEM - MAIN GEAR UP AND LOCKED SENSOR
LG POSITION INDICATING AND WARNING SYSTEM - MAIN GEAR UP AND LOCKED SENSOR
EFFECTIVITY
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Page 7
D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-61-00-003
Purpose
There are two main gear downlock sensors on the downlock
　
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