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Location
The two mix chambers are in the distribution compartment aft of
the main distribution manifold.
Physical Description
The mix chamber is a cylindrical duct assembly with an outer
shell and inner sleeve. The outer shell has the flange
connections for air into and out of the chamber. The inner
sleeve is perforated for mixing cold and hot air streams. The left
mix chamber has a small diameter tube to add more hot trim air
to the flight compartment duct.
Training Information Point
The mix chambers attach to the ducts with V-band clamps. The
left and right mix chambers are not interchangeable.
AIR CONDITIONING - MAIN AIR DISTRIBUTION - MIX CHAMBER
EFFECTIVITY
GUN 101-118 21-21-00
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AIR CONDITIONING - MAIN AIR DISTRIBUTION - MIX CHAMBER
AIR CONDITIONING - MAIN AIR DISTRIBUTION - MIX CHAMBER
EFFECTIVITY
GUN 101-118 21-21-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-21-00-003
General
The two air conditioning packs supply the main distribution
manifold with conditioned air. The main distribution manifold
supplies air to the passenger compartment through riser ducts
and an overhead distribution manifold. A moisture drain line
lets moisture in the main distribution manifold drain overboard.
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 connector
* Pack conditioned air
* Distribution manifolds and ducts.
AIR CONDITIONING - MAIN AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 001-099, 201-999 21-21-00
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21-21-00-801
AIR CONDITIONING - MAIN AIR DISTRIBUTION - INTRODUCTION
AIR CONDITIONING - MAIN AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 001-099 21-21-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-21-00-801
AIR CONDITIONING - MAIN AIR DISTRIBUTION - INTRODUCTION
AIR CONDITIONING - MAIN AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 201-999 21-21-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-21-00-801
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AIR CONDITIONING - MAIN AIR DISTRIBUTION - INTRODUCTION
21-21-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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 8 inch bayonet connector.
Check Valve
The check valve is inside 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
　
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