Trouble Shooting
Adjustment/Test

Air Conditioning Module........................................................................................... 21-51-01 Removal/Installation
Air Cycle Machine .................................................................................................... 21-51-11 Servicing Removal/Installation
Heat Exchangers ..................................................................................................... 21-51-21 Removal/Installation Adjustment/Test Cleaning
Water Separator....................................................................................................... 21-51-31 Removal/Installation
Contents 21 May 01/00
Page 4
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

Subject Subject No.
Water Separator Coalescer (Bag) ........................................................................... 21-51-41 Removal/Installation Inspection/Check Cleaning
35°F Control Valve................................................................................................... 21-51-51 Removal/Installation
Flexible Coupling Assembly..................................................................................... 21-51-61 Removal/Installation
RAM AIR SYSTEM. .................................................................................................... 21-52-0

Description and Operation
Inspection Doors
Ram Air Actuator
Ram Air Ducts
Ram Air Exhaust Louvers
Ram Air Inlet
Ram Air Inlet Modulation Panel Cable and Linkage System
Ram Air Control
Turbofan
Turbofan Valve

Trouble Shooting
Adjustment/Test

Ram Air Actuator...................................................................................................... 21-52-11 Removal/Installation
Ram Air Inlet Deflector............................................................................................. 21-52-21 Removal/Installation
Ram Air Inlet Deflector Shaft Assembly................................................................... 21-52-31 Removal/Installation
Ram Air Inlet Modulation Panel. .............................................................................. 21-52-41 Removal/Installation
Ram Air Inlet Modulation Panel Shaft Assembly ..................................................... 21-52-51 Removal/Installation
Turbofan................................................................................................................... 21-52-61 Servicing Removal/Installation
Turbofan Valve......................................................................................................... 21-52-71 Removal/Installation Subject Subject No.
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Oct 20/84  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Contents 21 Page 5 

Ram Air Inlet Control Cables ................................................................................... 21-52-81 Adjustment/Test
Exhaust Modulation Louver Assembly..................................................................... 21-52-91 Removal/Installation Approved Repairs
Ram Air Ducts.......................................................................................................... 21-52-101 Approved Repairs
EQUIPMENT COOLING SYSTEM ............................................................................. 21-58-0

Description and Operation
Equipment Cooling Blowers
Automatic Flow Control Valve
Equipment Mounting Shelves and Ducts
Airflow Detection System

Trouble Shooting
Adjustment/Test
Balancing

Equipment Cooling Main Blower.............................................................................. 21-58-11 Removal/Installation
Equipment Cooling Alternate Blower ....................................................................... 21-58-21 Removal/Installation
Automatic Flow Control Valve.................................................................................. 21-58-31 Removal/Installation
Airflow Detector........................................................................................................ 21-58-41 Removal/Installation
Equipment Cooling Blower Check Valve ................................................................. 21-58-51 Removal/Installation
Check (Ditching) Valve ............................................................................................ 21-58-81 Removal/Installation
TEMPERATURE CONTROL
CONDITIONED AIR TEMPERATURE CONTROL SYSTEMS................................... 21-61-0

Description and Operation
Air Mix Valve
Temperature Regulator
Temperature Selectors
Thermal Sensing Units

Trouble Shooting
Adjustment/Test
Cleaning/Painting
　
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