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Engine Controls
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
CHAPTER 76
Engine Controls
CH-SC-SU Subject Page Effectivity
76-00-00 ENGINE CONTROLS - INTRODUCTION 2 GUN ALL
76-00-00 ENGINE CONTROLS - GENERAL DESCRIPTION 5 GUN ALL
76-00-00 ENGINE CONTROLS - COMPONENT LOCATION 8 GUN ALL
76-00-00 ENGINE CONTROLS - INTERFACES 11 GUN ALL
76-00-00 ENGINE CONTROLS - THRUST LEVER 15 GUN ALL
76-00-00 ENGINE CONTROLS - START LEVER 18 GUN ALL
76-00-00 ENGINE CONTROLS - START LEVER - FUNCTIONAL DESCRIPTION 20 GUN ALL
76-00-00 ENGINE CONTROLS - REVERSE THRUST INTERLOCK SOLENOIDS 22 GUN ALL
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CHAPTER 76
Engine Controls
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The engine control system supplies most of the signals to
control the engine thrust. It also supplies signals to other
airplane systems that use engine control status.
The engine control system has these components:
* Thrust lever assemblies
* Thrust lever resolvers
* Engine start levers and switches
* Thrust lever interlock solenoids.
Abbreviations and Acronyms
* AGB - accessory gearbox
* AMM - aircraft maintenance manual
* ASM - autothrottle servomotor
* CDS/DEU - common display system/display electronics unit
* EEC - electronic engine control
* FDAU - flight data acquisition unit
* IDG - integrated drive generator
* HPSOV - high pressure shutoff valve
* RLA - reverse thrust lever angle
* TLA - thrust lever angle
* TO/GA - takeoff/go-around
* TRA - thrust lever resolver angle
* T/R - thrust reverser
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
The engine control system supplies manual and automatic
control inputs to operate the engine. The engine control system
has these components:
* Thrust levers (forward and reverse)
* Thrust lever resolvers
* Engine start levers and switches
* Thrust lever interlock solenoids.
Thrust Levers
You use the thrust levers to supply the manual inputs to the
engine control system. There are two thrust lever assemblies,
one for each engine. For each engine, there is a forward thrust
lever and a reverse thrust lever. The reverse thrust lever is on
the forward thrust lever.
For each engine, the thrust levers supply a thrust command
signal to the electronic engine control (EEC) through the thrust
lever resolver. Each thrust lever assembly connects
mechanically to the resolver through an adjustable rod.
An interlock latch prevents the operation of the forward thrust
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