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 49-CONTENTS
 GUN Page 10 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 CHAPTER 49 - AIRBORNE AUXILIARY POWER
 TABLE OF CONTENTS_________________
 Chapter
 Section
 Subject Subject_______ _______  Page____  Effectivity___________
 CONTROL SYSTEM - APU 49-61-00
 Description and Operation  1  ALL
 General  1
 Box - Thermocouple Trim  1
 Controller - APU  5
 Sensor - Inlet Pressure  5
 Sensors - Air Temperature  1
 Sensors - Speed  1
 Switch - APU Control  5
 Switch . APU Start Source  5
 Thermocouples - Exhaust Gas  1
 Transformer - Current  5
 Unit - Serial Number  5
 Identification
 Operation  10
 Component Location  101  ALL
 Component Index
 Component Location
 BOX - THERMOCOUPLE TRIM 49-61-04
 Removal/Installation  401  ALL
 Adjustment/Test  501  ALL
 CONTROLLER - APU 49-61-07
 Removal/Installation  401  ALL
 SENSOR - INLET PRESSURE 49-61-06
 Removal/Installation  401  ALL
 SENSOR - SPEED 49-61-02
 Removal/Installation  401  ALL

 49-CONTENTS
 GUN Page 11 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 CHAPTER 49 - AIRBORNE AUXILIARY POWER
 TABLE OF CONTENTS
_________________ Chapter
 Section
 Subject_______  Subject_______ 
SENSORS - AIR TEMPERATURE  49-61-05
 Removal/Installation 
General 
Sensor - Air Inlet 
Temperature and
 Thermocouple Cold Junction
 (T1/T6) Removal
 Sensor - Air Inlet 
Temperature and
 Thermocouple Cold Junction
 (T1/T6) Installation
 Sensor - T12 Air Temperature 
Installation
 Sensor - T12 Air Temperature 
Removal
 Sensor - T13 Air Temperature 
Installation
 Sensor - T13 Air Temperature 
Removal
 THERMOCOUPLE - EXHAUST GAS  49-61-03
 TEMPERATURE
 Removal/Installation 
TRANSFORMER - APU CURRENT  49-61-11
 Removal/Installation 
UNIT - SERIAL NUMBER  49-61-10
 IDENTIFICATION
 Maintenance Practices 
INDICATING SYSTEM_________________ 49-70-00
 SYSTEM - APU EICAS INDICATING  49-71-00
 Description and Operation 
General 
EICAS (APU) Maintenance Page 
EICAS Status Page 
Oil Quantity 
EXHAUST_______ 49-80-00

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 49-CONTENTS
 GUN Page 12 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 CHAPTER 49 - AIRBORNE AUXILIARY POWER
 TABLE OF CONTENTS_________________
 Chapter
 Section
 Subject Subject_______ _______  Page____  Effectivity___________
 SYSTEM - APU EXHAUST 49-81-00
 Description and Operation  1  ALL
 General  1
 Duct - Inner Exhaust  1
 Duct - Outer Exhaust  1
 Liner - Acoustic  1
 Operation  1
 Component Location  101  ALL
 Component Index
 Component Location
 CLAMP - APU EXHAUST V-BAND 49-81-04
 Inspection/Check  601  ALL
 DUCT - APU TURBINE EXHAUST 49-81-01
 Inspection/Check  601  ALL
　
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