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inlet case, collecting and averaging the pressures.
HPC discharge pressure PS3. The lower part of the line is drained through a weep hole.
The PS3 static pressure pick-up is located on the combustion case, at the 9 o’clock position, between two fuel nozzles.
The lower part of the line is drained through a weep hole.

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CTC-201-059-02
EFFECTIVITY
SENSORS Page 33
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ENGINE SENSORS
Fan discharge static pressure PS13. HPC inlet total pressure P25.
PS13 is part of the optional monitoring kit, available upon P25 is part of the optional monitoring kit, available upon customer request. customer request.
If the kit is not installed, the PS13 port is blanked off on If the kit is not installed, the P25 port is blanked off on the ECU shear plate. the ECU shear plate.
The PS13 pick-up is located at approximately 1 o’clock, The P25 probe is installed in the fan frame mid-box downstream from the fan Outlet Guide Vanes (OGV). structure, at the 5 o’clock position.
This signal is processed by channel A only. The pressure line exits the fan frame on its rear wall through a nipple. The lower part of the line is drained through a weep hole. The signal is processed by channel B only.

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CTC-201-060-02
EFFECTIVITY

SENSORS Page 35
ALL CFM56-5B ENGINES FOR A319-A320-A321

ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ENGINE SENSORS
Vibration sensors.
The engine is equipped with two accelerometers, which are able to sense and measure vertical displacement.
Both sensors are piezo-electric type, which have a stack of piezo-electric discs that are placed between a mass and a base.
When the accelerometer is subjected to a vibration, the mass exerts a load on the discs. This load generates a qyantity of current directly proportional to G load.

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CTC-201-251-01
EFFECTIVITY
SENSORS Page 37
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ENGINE SENSORS
#1 bearing vibration sensor assembly.
The assembly is made up of a vibration sensor, which is secured at the 9 o’clock position on the #1 bearing support front flange.
It is a 100 pC/g piezo-electric sensor.
A semi-rigid cable, routed in the engine fan frame, links the vibration sensor to an electrical output connector, located at the 3 o’clock position on the fan frame outer barrel.
　
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