CHAPTER
80
Engine Starting PW
777 AIRCRAFT MAINTENANCE MANUAL 
CHAPTER 80 Engine Starting PW
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CHAPTER 80 
Engine Starting PW
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80-00-00  ENGINE STARTING -INTRODUCTION  2  BEJ ALL  
80-00-00  ENGINE STARTING -GENERAL DESCRIPTION  4  BEJ ALL  
80-00-00  ENGINE STARTING -COMPONENT LOCATIONS -ENGINE  6  BEJ ALL  
80-00-00  ENGINE STARTING -COMPONENT LOCATIONS -FLIGHT DECK  8  BEJ ALL  
80-00-00  ENGINE STARTING -STARTER AIR VALVE  10  BEJ ALL  
80-00-00  ENGINE STARTING -STARTER AIR VALVE SOLENOID AND FILTER  12  BEJ ALL  
80-00-00  ENGINE STARTING -STARTER  14  BEJ ALL  
80-00-00  ENGINE STARTING -STARTER SERVICING  16  BEJ ALL  
80-00-00  ENGINE STARTING -FUNCTIONAL DESCRIPTION  19  BEJ ALL  
80-00-00  ENGINE STARTING -FUNCTIONAL DESCRIPTION -START PROFILE  22  BEJ ALL  
80-00-00  ENGINE STARTING -OPERATION  25  BEJ ALL 
80-CONTENTS 
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PW4000 SERIES ENGINES
777 AIRCRAFT MAINTENANCE MANUAL
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ENGINE STARTING -INTRODUCTION
General 
The engine starting system uses pneumatic power to turn the N2 shaft during an engine start. You also use the system to motor the engine. 
The engine starting system operates on the ground and in the air. Flight deck switches and the EEC control the system. 
The engine starting system uses these pneumatic power sources: 
* 
Auxiliary power unit (APU)
* 
Ground power unit (GPU)
* 
Opposite operating engine.
Abbreviations and Acronyms 
* 
AIMS -airplane information management system
* 
APU -auxiliary power unit
* 
ASCPC -air supply cabin pressure controller
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capt -captain
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EEC -electronic engine control
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EDIU -engine data interface unit
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EICAS -engine indication and crew alerting system
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ELMS -electrical load management system
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ERU -engine relay unit
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flt -flight
* 
GPU -ground power unit
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inst -instrument
* 
LRU -line replaceable unit
* 
max -maximum
* 
mgmt -management
* 
OPAS -overhead panel ARINC systems
 
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