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21-23-00-801
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - INTRODUCTION
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 001-099 21-23-00
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D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-23-00-801
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - INTRODUCTION
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 201-999 21-23-00
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D633A101-GUN Oct 10/2005
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-23-00-801
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AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - INTRODUCTION
21-23-00
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D633A101-GUN Oct 10/2005
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The overhead distribution duct divides the supply of conditioned
air to outlets along the center and sidewalls of the passenger
cabin for a symmetrical balance of airflow.
Location
The overhead distribution duct is in the center ceiling area of
the passenger compartment.
Physical Description
The overhead distribution duct is a cylindrical composite tube.
There are outlets along its length that attach to riser ducts and
flexible sidewall ducts. The fittings in the area where the
sidewall riser ducts attach permit the attachment of
temperature sensors.
GUN 020-099
The overhead distribution duct spuds are longer and
incorporate a vent hole to provide an additional air flow and
drying effect through the crown vent system.
GUN 001-099, 201-999
The sidewall riser ducts attach on the left and right sides of the
overhead distribution manifold.
Training Information Point
You get access to the overhead distribution duct through the
ceiling panels in the passenger cabin. Screws attach the
diffuser outlet assembly to the overhead distribution duct. Duct
brackets attach the overhead distribution duct to the ceiling
supports. Diffuser/hose connections on the overhead
distribution duct connect to the sidewall diffusers.
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - OVERHEAD DISTRIBUTION DUCT
EFFECTIVITY
GUN 001-099, 201-999 21-23-00
Page 10
D633A101-GUN Jun 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-23-00-802
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - OVERHEAD DISTRIBUTION DUCT
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - OVERHEAD DISTRIBUTION DUCT
EFFECTIVITY
GUN 001-099, 201-999 21-23-00
Page 11
D633A101-GUN Oct 10/2005
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-23-00-802
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21-25-00
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D633A101-GUN Oct 10/2002
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The recirculation system supplies air for ventilation. The use of
cabin air for ventilation decreases the use of air from the engine
bleed system.
General Description
The recirculation system collects cabin air to use with pack air
in the distribution system. The distribution system supplies air
to the passenger compartment area.
The passenger cabin air moves through these recirculation
components:
* Collector shroud
* Air filter
* Fan
* Check valve.
Location
The recirculation components are in the distribution
compartment.
Operation
You enable the recirculation fan when you move the RECIRC
FAN switch to the AUTO position. Recirculation fan operation
has a relation to air conditioning pack operation.
AIR CONDITIONING - RECIRCULATION SYSTEM - INTRODUCTION
EFFECTIVITY
GUN 101-118 21-25-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-25-00-001
AIR CONDITIONING - RECIRCULATION SYSTEM - INTRODUCTION
AIR CONDITIONING - RECIRCULATION SYSTEM - INTRODUCTION
EFFECTIVITY
GUN 101-118 21-25-00
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
　
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