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Engine Starting
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
CHAPTER 80
Engine Starting
CH-SC-SU Subject Page Effectivity
80-00-00 ENGINE STARTING - INTRODUCTION 2 GUN ALL
80-00-00 ENGINE STARTING - GENERAL DESCRIPTION 5 GUN ALL
80-00-00 ENGINE STARTING - COMPONENT LOCATIONS - ENGINE 10 GUN ALL
80-00-00 ENGINE STARTING - COMPONENT LOCATIONS - FLIGHT
COMPARTMENT AND EE COMPARTMENT
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80-00-00 ENGINE STARTING - START VALVE 14 GUN ALL
80-00-00 ENGINE STARTING - STARTER 17 GUN ALL
80-00-00 ENGINE STARTING - FUNCTIONAL DESCRIPTION 21 GUN ALL
80-00-00 ENGINE STARTING - TRAINING INFORMATION POINT 26 GUN ALL
80-00-00 ENGINE STARTING - OPERATION 28 GUN ALL
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CHAPTER 80
Engine Starting
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
The engine starting system uses pneumatic power to turn the
engine’s N2 rotor during a start or motor procedure. Pneumatic
power comes from one of these sources:
* APU
* Pneumatic ground equipment
* Opposite engine.
These components control the engine start system:
* Flight compartment switches
* Display electronics unit (DEU)
* Electronic engine control (EEC).
The engine starting system operates on the ground and in flight.
Abbreviations & Acronyms
* AGB - engine accessory gearbox
* ALF - aft looking forward
* AMM - airplane maintenance manual
* CDS - common display system
* CDU - control display unit
* DEU - display electronics unit
* EEC - electronic engine control
* FMCS - flight management computer system
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80-00-00-000
General
The engine starting system uses these airplane and engine
systems or components:
* Pneumatic power
* Electrical power
* Flight compartment switches
* Engine fuel control system
* Engine control system.
* Common display system (CDS).
Engine Start Switch
You put the engine start switch to the GRD position to turn the
engine with the starter. The switch automatically moves to the
OFF position at starter cutout.
When electrical and pneumatic power is available, this happens
when you put the switch to the GRD position:
* Electronic engine control (EEC) receives a start signal
* APU receives an engine start signal
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