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the flow of conditioned air to the passenger cabin.
General
The passenger cabin conditioned air distribution system uses
these components:
* Sidewall riser ducts
* Overhead distribution ducts
* Plenum/nozzle assemblies
* Flexible hoses
* Sidewall diffuser outlets
* Diffuser/hose assembly.
Conditioned air from the main distribution manifold flows
through sidewall riser ducts. The riser ducts follow the
airplane contour along the right and left fuselage. The riser
ducts supply the overhead distribution ducts.
The overhead distribution ducts are longitudinally along the top
center of the passenger cabin.
Conditioned air from the overhead distribution ducts flows to the
sidewall diffusers and plenum/nozzle assemblies through
diffuser/hoses and mufflers.
The overhead distribution duct connects to flexible hoses to
supply the galleys and the lavatories in the front and aft cabin
areas.
The passenger cabin exhaust air flows through floor grilles to
the recirculation system or overboard.
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 101-118 21-23-00
Page 2
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-23-00-001
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - INTRODUCTION
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 101-118 21-23-00
Page 3
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-23-00-001
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. In the area where the sidewall riser
ducts attach, the fittings permit the attachment of temperature
sensors.
The sidewall riser ducts attach on the left and right sides of the
overhead distribution manifold.
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - OVERHEAD DISTRIBUTION DUCT
EFFECTIVITY
GUN 101-118 21-23-00
Page 4
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-23-00-002
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - OVERHEAD DISTRIBUTION DUCT
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - OVERHEAD DISTRIBUTION DUCT
EFFECTIVITY
GUN 101-118 21-23-00
Page 5
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-23-00-002
Purpose
The passenger cabin conditioned air distribution system divides
the flow of conditioned air to the passenger cabin.
General
The passenger cabin conditioned air distribution system uses
these components:
* Sidewall riser ducts
* Overhead distribution ducts
* Plenum/nozzle assemblies
* Flexible hoses
* Sidewall diffuser outlets
* Diffuser/hose assembly.
Conditioned air from the main distribution manifold flows
through sidewall riser ducts. The riser ducts follow the
airplane contour along the right and left fuselage. The left
side has two riser sections, the right side has one. The riser
ducts supply the overhead distribution ducts.
The overhead distribution ducts are along the top center of the
passenger cabin.
Conditioned air from the overhead distribution ducts goes to the
sidewall diffusers and plenum/nozzle assemblies through
diffuser/hoses and mufflers.
The overhead distribution duct connects to flexible hoses to
supply the galleys and the lavatories in the front and aft cabin
areas.
The passenger cabin exhaust air goes through floor grilles to
the recirculation system or overboard.
AIR CONDITIONING - PASSENGER CABIN CONDITIONED AIR DISTRIBUTION - INTRODUCTION
EFFECTIVITY
GUN 001-099, 201-999 21-23-00
Page 6
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
　
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