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you must replace the nameplate. The nameplate also shows the
thrust rating history of the engine.
The engine nameplate is on the right fan case aft of the oil tank.
Engine Thrust Ratings and Aircraft Model Application
A limited number of the six engine thrust rating configurations
are applicable to a 737 model. The different engine thrust
ratings are based upon airplane weight and elevator/rudder
control limits. The longer-body 737-800 and 737-900 models can
operate at the maximum thrust capability of the CFM56-7B
engine. Also, the lowest thrust rating is not sufficient for the 737-
700, 737-800, 737-900. The table below shows the relationship of
the engine thrust ratings to the aircraft model.
Aircraft Models
The normal models are 737-600, 700, 800, and 900. Some other
variations can be 737-700 IGW (increased gross weight), and
737-700 BBJ (Boeing business jet).
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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POWER PLANT - SPECIFICATIONS
POWER PLANT - SPECIFICATIONS
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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General
It is dangerous to work around engines. Use the entry/exit
corridor when the engine is in operation. Also, stay out of the
inlet and exhaust areas when the engine is in operation.
CAUTION: PERFORM FOD WALK IN FRONT OF AND AROUND
ENGINE INGESTION AREA PRIOR TO ENGINE
START.
These are the hazards around an engine in operation:
* Inlet suction
* Exhaust heat
* Exhaust velocity
* Engine noise.
Inlet Suction
Engine inlet suction can pull people and large objects into the
engine. At idle power, the inlet hazard area is a 10 ft (3.1 m)
radius around the inlet.
WARNING: IF THE WIND IS OVER 25 KNOTS, INCREASE THE
INLET HAZARD AREA BY 20 PERCENT.
Exhaust Heat
The engine exhaust is very hot for long distances behind the
engine. This can cause damage to personnel and equipment.
Exhaust Velocity
Exhaust velocity is very high for long distances behind the
engine. This can cause damage to personnel and equipment.
Engine Noise
Engine noise can cause temporary and permanent loss of
hearing. You must wear ear protection when near an engine in
operation.
Engine Entry/Exit Corridor
Engine entry corridors are between the inlet hazard areas and
the exhaust hazard areas. You should go near an engine in
operation only when:
* Engine is at idle
* You can speak with people in the flight compartment.
For additional safety, wear a safety harness when the engine is
in operation.
Training Information Point
The beacon light must be on while the engines are on.
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POWER PLANT - ENGINE HAZARDS
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General
There is a forward and aft engine mount. Each engine mount
attaches the engine to the strut. The forward engine mount
attaches to the fan frame. The aft engine mount attaches to the
turbine frame.
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POWER PLANT - ENGINE MOUNTS
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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General
The engine electrical harnesses connect at the fan cowl support
beam.
The electrical harnesses that connect on the right side of the fan
cowl support beam come from these components:
　
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