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CHAPTER 21
AIR CONDITIONING
TABLE OF CONTENTS Subject Subject No.
AIR CONDITIONING...................................................................................................... 21-00 Description and Operation Maintenance Practices Pack Cooling System Performance Test
AIR CONDITIONING SYSTEM................................................................................... 21-00-01 Maintenance Practices Air Conditioning System Oil Contamination Removal
CONFIDENCE CHECK OF AIRPLANE ABILITY TO MAINTAIN CABIN PRESSURE IN FLIGHT ON SINGLE PACK OPERATION.......................................................... 21-00-05 Trouble Shooting Maintenance Practices
COMPRESSION
ENGINE BLEED AIR COMPRESSION CONTROL SYSTEM.................................... 21-11-0
Description and Operation
Modulating and Shutoff Valve
Pack Valve
Pressure Regulator
4500F Thermostat
Servicing
Trouble Shooting
Adjustment/Test
Modulating and Shutoff Valve.................................................................................. 21-11-11 Removal/Installation
Pack Valve ............................................................................................................... 21-11-21 Removal/Installation
Pressure Regulator .................................................................................................. 21-11-31 Removal/Installation
AIR CLEANER SYSTEM ............................................................................................ 21-12-0
Description and Operation
Air Cleaner
Electrical Control
Purge Valve
Adjustment/Test
Engine Bleed Air Cleaner......................................................................................... 21-12-11 Removal/Installation
Air Cleaner Purge Valve .......................................................................................... 21-12-21 Removal/Installation
525 May 01/01 Contents 21 Page 1 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Subject Subject No.
DISTRIBUTION .............................................................................................................. 21-20-0 Description and Operation
MAIN DISTRIBUTION MANIFOLD ............................................................................. 21-21-0
Description and Operation
Ground Service Conditioned Air Connection
Main Distribution Manifold Relief Valve
Ground Service Conditioned Air Duct and Check Valve Assembly......................... 21-21-11 Removal/Installation
Main Distribution Manifold Relief Valve ................................................................... *[3] 21-21-21 Removal/Installation Approved Repairs
CONTROL CABIN CONDITIONED AIR DISTRIBUTION SYSTEM........................... 21-22-0
Description and Operation
Control Cabin Conditioned Air Outlets
Forward Cargo Heat Distribution
Muffler
Maintenance Practices
Control Cabin Fan.................................................................................................... 21-22-11 Removal/Installation
Windshield Air and Foot Outlet Valve ...................................................................... 21-22-31 Removal/Installation
PASSENGER CABIN CONDITIONED AIR DISTRIBUTION SYSTEM...................... 21-23-0
Description and Operation
Galley Vent System
Overhead Supply Riser Ducts
Passenger Cabin Overhead Distribution Duct
Passenger Cabin Air Exhaust
Passenger Cabin Distribution Shutoff System
Overhead Distribution Duct...................................................................................... 21-23-11 Removal/Installation
Conditioned Air Distribution Duct Assembly ............................................................ 21-23-12 Removal/Installation
Forward Overhead Distribution Duct. ...................................................................... *[2] 21-23-22 Maintenance Practices
Aft Overhead Distribution Duct ................................................................................ 21-23-42 Removal/Installation
Forward Light Fixture Air Shutoff Valve ................................................................... *[1] 21-23-51 Removal/Installation
Vent Muffler.............................................................................................................. 21-23-61 Maintenance Practices
Contents 21 Feb 20/89 Page 2 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Subject Subject No.
INDIVIDUAL (GASPER) AIR DISTRIBUTION SYSTEM............................................ 21-24-0 Description and Operation Control Cabin Gasper Air Distribution Passenger Cabin Gasper Air Distribution Gasper Fan
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