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* Start valve opens and the pneumatic starter turns the
engine.
The crew uses the FLT position to start the engine in flight when
the starter is not necessary.
The CONT position supplies continuous ignition.
See the engine ignition chapter for more information on the
ignition system. (CHAPTER 74)
Start Valve and Starter
The start valve opens to supply power to the starter. Usually,
this valve opens when you put the engine start switch to the
GRD position. The start valve position shows on the engine
display. You can manually open the valve.
The starter turns the engine N2 rotor through the engine
accessory gearbox (AGB).
EEC
The EEC protects the engine during start. The EEC shuts off fuel
supply to the engine when it finds the engine parameters are
out of limits during a start.
Display Electronics Units (DEUs)
GUN 001-099, 101-115
The DEUs are components of the common display system
(CDS). The DEUs monitor N2 and let the engine start switch go
back to the OFF position at starter cutout.
ENGINE STARTING - GENERAL DESCRIPTION
EFFECTIVITY
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GUN 001-099, 101-115 (Continued)
GUN 201-999
The DEUs are components of the common display system
(CDS). The DEUs monitor N2 and let the engine start switch go
back to the AUTO position at starter cutout. A signal goes to the
EEC by the DEU to let the EEC use its automatic ignition feature.
GUN ALL
ENGINE STARTING - GENERAL DESCRIPTION
EFFECTIVITY
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
80-00-00-001
ENGINE STARTING - GENERAL DESCRIPTION
ENGINE STARTING - GENERAL DESCRIPTION
EFFECTIVITY
GUN 001-099, 101-110, 115 80-00-00
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
80-00-00-001
ENGINE STARTING - GENERAL DESCRIPTION
ENGINE STARTING - GENERAL DESCRIPTION
EFFECTIVITY
GUN 111-114 80-00-00
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
80-00-00-001
ENGINE STARTING - GENERAL DESCRIPTION
ENGINE STARTING - GENERAL DESCRIPTION
EFFECTIVITY
GUN 201-999 80-00-00
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
80-00-00-001
General
The engine starting system has these components on the left
side of the engine:
* Pneumatic starter ducts
* Start valve
* Starter.
You open the left fan cowl to get access to these components.
The electronic engine control (EEC) is on the right side of the
engine fan case at the 2:00 position, aft looking forward (ALF).
You open the right fan cowl to get access to the EEC.
Pneumatic Starter Ducts
There are two pneumatic starter duct assemblies.
The upper assembly has two tubes and two flexible joints. One
end connects to a pneumatic duct at the strut. The other end
attaches to the start valve. The assembly attaches to the fan
case.
The lower assembly has one tube. The assembly connects to
the start valve and to the starter. The assembly attaches to the
fan case.
Start Valve
The start valve is above the starter on the fan case.
Starter
The starter is on the forward face of the engine accessory
gearbox (AGB) at the 8:00 position.
ENGINE STARTING - COMPONENT LOCATIONS - ENGINE
EFFECTIVITY
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ENGINE STARTING - COMPONENT LOCATIONS - ENGINE
ENGINE STARTING - COMPONENT LOCATIONS - ENGINE
EFFECTIVITY
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80-00-00-002
Flight Compartment
　
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