21-CONTENTS
 GUN Page 16 May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 757 MAINTENANCE MANUAL
 CHAPTER 21 - AIR CONDITIONING

 TABLE OF CONTENTS_________________
 Chapter
 Section
 Subject Subject_______ _______  Page____  Effectivity___________
 VALVE - EQUIPMENT COOLING 21-58-05
 OVERBOARD EXHAUST
 Removal/Installation  401  ALL
 TEMPERATURE CONTROL 21-60-00___________________
 Component Location  101  ALL
 Component Index
 Component Location
 PRIMARY (ZONE) TEMPERATURE CONTROL 21-61-00
 SYSTEM
 Description and Operation  1  ALL
 General  1
 Component Details  3
 Check Valves for the Trim  6
 Air Supply
 Duct Air Temperature Sensors  6
 Pressure Regulating Valve  7
 for the Trim Air System
 The Modulating Valve for the  10
 Trim Air
 Zone Duct Overheat Switches  6
 Zone Temperature Controller  12
 Zone Temperature Selectors  7
 Zone Temperature Sensors  3
 Operation  14
 Built-In-Test Equipment  21
 (BITE)
 Control  23
 Functional Description  14
 Adjustment/Test  501  ALL
 Operational Test - Primary  501
 (Zone) Temperature Control
 System
 System Test - Primary (Zone)  505
 Temperature Control System
 CONTROLLER - ZONE TEMPERATURE 21-61-03
 Removal/Installation  401  ALL
 FAN - ZONE TEMPERATURE SENSOR 21-61-09
 Removal/Installation  401  ALL
 (TASK ORIENTED DATA)  401
 Inspection/Check  601  ALL

 21-CONTENTS
 GUN Page 17 May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 CHAPTER 21 - AIR CONDITIONING
 TABLE OF CONTENTS_________________
 Chapter
 Section
 Subject Subject_______ _______  Page____  Effectivity___________
 FILTER - ZONE TEMPERATURE SENSOR 21-61-11
 Removal/Installation  401  ALL
 MUFFLER - TRIM AIR 21-61-12
 Removal/Installation  401  ALL
 ú PLENUM AND FILTER CLEANING -21-61-13
 ú ZONE TEMPERATURE SENSOR
 ú Cleaning/Painting  701  ALL
 SELECTOR - ZONE TEMPERATURE 21-61-04
 Removal/Installation  401  ALL
 SENSOR - DUCT AIR TEMPERATURE 21-61-02
 Removal/Installation  401  ALL
 Inspection/Check  601  ALL
 SENSORS - ZONE TEMPERATURE 21-61-08
 Removal/Installation  401  ALL
 Inspection/Check  601  ALL
 SWITCH - ZONE DUCT OVERHEAT 21-61-01
 Removal/Installation  401  ALL
 Adjustment/Test  501  ALL
 Zone Duct Overheat Switch  501
 System Test
 VALVE - TRIM AIR MODULATING 21-61-07
 Removal/Installation  401  ALL
 (TASK ORIENTED DATA)  401
 VALVE - TRIM AIR PRESSURE 21-61-06
 REGULATING
 Removal/Installation  401  ALL
 VALVE - TRIM AIR SUPPLY CHECK 21-61-05
 Removal/Installation  401  ALL
 Inspection/Check  601  ALL
 VALVE POSITION INDICATION SYSTEM 21-64-00
 Description and Operation  1  ALL
 General  1
 Control  1
 Operation  1
 CABIN (ZONE) TEMPERATURE 21-65-00
 INDICATION SYSTEM
 Description and Operation  1  ALL
 General  1
 Operation  1
 Temperature Indication  1
 Adjustment/Test  501  ALL
 System Test - Cabin (Zone)  501
 Temperature Indication System

 21-CONTENTS
 GUN.1 Page 18 Sep 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 
757 
MAINTENANCE MANUAL
 CHAPTER 21 - AIR CONDITIONING
 TABLE OF CONTENTS_________________
 Chapter
 Section
 Subject Subject Page_______ _______ ____  Effectivity___________
　
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