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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-00-00-002
The pressure for nose wheel steering comes from the nose
landing gear extension pressure only. Hydraulic system A
normally supplies pressure to the nose gear steering through
the landing gear control system.
See the nose wheel steering system for more information about
the nose wheel steering. (SECTION 32-51)
The landing gear control system also provides normal or
alternate hydraulic pressure to these systems:
* Main landing gear shimmy damper
* Gear retract brake system
See the Main Landing Gear and Doors System for more
information about the main landing gear shimmy damper.
(SECTION 32-10)
LANDING GEAR - GENERAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-00-00-002
LANDING GEAR - GENERAL DESCRIPTION
LANDING GEAR - GENERAL DESCRIPTION
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-00-00-002
General
You install a downlock pin into the main landing gear to make
sure an outside force does not unlock the main landing gear.
There is one main landing gear downlock pin for each main
landing gear.
The downlock pin installs in the MLG downlock strut.
WARNING: YOU MUST CAREFULLY INSTALL THE GROUND
LOCKS IN ALL LANDING GEAR. AN ACCIDENTAL
RETRACTION OF THE LANDING GEAR CAN
CAUSE INJURY TO PERSONS AND DAMAGE TO
EQUIPMENT.
LANDING GEAR - DOWNLOCK PIN - MAIN LANDING GEAR
EFFECTIVITY
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-00-00-003
LANDING GEAR - DOWNLOCK PIN - MAIN LANDING GEAR
LANDING GEAR - DOWNLOCK PIN - MAIN LANDING GEAR
EFFECTIVITY
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-00-00-003
General
You install a downlock pin into the nose landing gear to make
sure an outside force does not unlock the nose landing gear.
There is one nose landing gear downlock pin for the nose
landing gear.
The nose landing gear downlock pin installs in the NLG
downlock pin hole.
WARNING: YOU MUST CAREFULLY INSTALL THE GROUND
LOCKS IN ALL LANDING GEAR. AN ACCIDENTAL
RETRACTION OF THE LANDING GEAR CAN
CAUSE INJURY TO PERSONS AND DAMAGE TO
EQUIPMENT.
LANDING GEAR - DOWNLOCK PIN - NOSE LANDING GEAR
EFFECTIVITY
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-00-00-004
LANDING GEAR - DOWNLOCK PIN - NOSE LANDING GEAR
LANDING GEAR - DOWNLOCK PIN - NOSE LANDING GEAR
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-00-00-004
Purpose
The air/ground system supplies air/ground discrete signals to
many airplane systems.
The proximity switch electronics unit (PSEU) is a component of
the air/ground system. Many airplane systems send signals to
the PSEU through position sensors and switches. The PSEU
also controls the air/ground relays (12).
These are the systems/components controlled by the proximity
switch electronics unit (PSEU):
* Landing gear transfer valve
* Landing gear position indicating and warning
* Speedbrake deployed indication
* Takeoff warning
* Door warning
* Air/ground relays.
General
The landing gear transfer valve lets the landing gear be raised
by the B hydraulic system. See the landing gear control system
section for more information about the landing gear transfer
valve. (SECTION 32-31)
Landing gear position indication and warning provides
indication about the status of the landing gear. It also warns
the pilot of an unsafe condition. See the landing gear position
indication and warning system section for more information
about landing gear position indication and warning.
(SECTION 32-61)
The speedbrake deployed indication system turns on the
SPEEDBRAKES EXTENDED light when the ground spoilers
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