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AIR CONDITIONING - DISTRIBUTION - OPERATION
EFFECTIVITY
GUN 001-099, 201-999 21-20-00
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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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
21-20-00-803
AIR CONDITIONING - DISTRIBUTION - OPERATION
AIR CONDITIONING - DISTRIBUTION - OPERATION
EFFECTIVITY
GUN 001-099, 201-999 21-20-00
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D633A101-GUN Oct 10/2005
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-20-00-803
THIS PAGE IS INTENTIONALLY LEFT BLANK
21-21-00
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D633A101-GUN Oct 10/2002
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
The two air conditioning packs supply conditioned air to the
main distribution manifold. The main distribution manifold
supplies air to the passenger compartment through riser
ducts and an overhead distribution manifold.
Location
The main air distribution components are in the distribution
compartment aft of the forward cargo compartment. There are
manifolds and ducts along the sidewalls and above the ceiling
area of the passenger cabin.
Interfaces
The main air distribution subsystem has interfaces with these
sub-subsystems:
* Recirculation system
* Ground conditioned air connection
* Pack conditioned air
* Distribution manifolds and ducts.
AIR CONDITIONING - MAIN AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 101-118 21-21-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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AIR CONDITIONING - MAIN AIR DISTRIBUTION - INTRODUCTION
AIR CONDITIONING - MAIN AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 101-118 21-21-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Purpose
The ground conditioned air connector lets an external source of
conditioned air supply the airplane air conditioning system.
Location
The ground conditioned air connector is in the main distribution
compartment (aft of the forward cargo compartment). There is
an external access panel forward of the air conditioning
compartments.
Physical Description
The ground conditioned air connector is a short duct section
with a check valve. There are two slotted connect holes on the
outside fitting for the ground cart hose hook-up. The ground air
connection uses a standard eight-inch bayonet connector.
Check Valve
The check valve is in the ground conditioned air connector. It
prevents the loss of air through the connector when the air
conditioning system is on. When you attach the ground cart
hose, the check valve moves out of the air flow path. The ground
conditioned air can flow into the distribution system.
Training Information Point
The ground conditioned air connector attaches to the main
distribution manifold duct with band clamps. The connector
fitting attaches to the skin of the airplane with a pressure seal.
A hinge on the duct and the check valve assembly has a spring.
The spring holds the check valve open when the air
conditioning system is off. When the air conditioning system
is on, the pressure in the manifold causes the check valve to
close.
Before you install the duct and check valve assembly, you must
do an inspection of the check valve to make sure the spring
holds the check valve open a short distance. Adjust the hinge if
necessary and test the check valve for correct operation.
AIR CONDITIONING - MAIN AIR DISTRIBUTION - GROUND CONDITIONED AIR CONNECTOR
EFFECTIVITY
GUN 101-118 21-21-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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AIR CONDITIONING - MAIN AIR DISTRIBUTION - GROUND CONDITIONED AIR CONNECTOR
AIR CONDITIONING - MAIN AIR DISTRIBUTION - GROUND CONDITIONED AIR CONNECTOR
EFFECTIVITY
GUN 101-118 21-21-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-21-00-002
Purpose
The mix chamber mixes hot and cold air from the pack before it
goes into the distribution system.
　
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