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CTC-201-053-01
EFFECTIVITY
SENSORS Page 21
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ENGINE SENSORS
Exhaust Gas Temperature. The EGT wiring harness consists of :
The Exhaust Gas Temperature (EGT) sensing system is - Three thermocouple lead assemblies with two located at aerodynamic station 49.5. probes in each. Each thermocouple carries 2 measurements to a parallel junction box. This EGT value is used to monitor the engine’s condition.
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One thermocouple lead assembly with three probes. The system includes nine probes, secured on the Low This assembly carries 3 measurements to a Pressure Turbine (LPT) case and the sensing elements parallel junction box. are immersed in the LPT nozzle stage 2.

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One main junction box assembly where all the Each thermocouple produces an electrical output signal thermocouple lead assemblies are connected. The proportional to the temperature. They are connected main junction box averages the nine input signals, together through a wiring harness. and, through a connector and lead assembly, 

sends one output signal to both channels of the ECU, where the signal is subject to validation checks.

EFG
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CTC-201-054-02
EFFECTIVITY
SENSORS Page 23
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ENGINE SENSORS
LPT discharge temperature T5.
The T5 temperature sensor is located at the 4 o’clock position, on the turbine rear frame .
This sensor is part of the optional monitoring kit, available upon customer request.
It consists of a metal body, which has two thermocouple probes and a flange for attachment to the engine.
A rigid lead carries the signal from the probe to a main junction box with a connector that allows connection with a harness.
The two thermocouples are parallel-wired in the box and a single signal is sent to the ECU channel A.

EFG

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CTC-201-055-01
EFFECTIVITY
SENSORS Page 25
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ENGINE SENSORS
 T case.
The T case sensor measures the High Pressure Turbine (HPT) shroud support temperature.
The temperature value is used by the ECU in the HPT Clearance Control system logic.
The sensor is installed on the combustion case at the 3 o’clock position, and consists of :
　
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