The receptacle has three electrical connectors.
Two connectors provide the ECU with output signals.
The third is connected to the EVMU.
The N1 sensor ring has one tooth which is thicker than
the others and this generates a stronger pulse in the
sensor and is used as a phase reference in engine
vibration analysis.
Internally, a spring keeps correct installation of the sensor
probe, regardless of any dimensional changes due to
thermal effects.
Externally, there are two damping rings to isolate the
probe from vibration.
EFG
CTC-201-047-01
EFFECTIVITY
SENSORS Page 9
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ENGINE SENSORS
N2 speed sensor.
The N2 speed sensor is installed on the rear face of the AGB at 6 o’clock and secured with 2 bolts.
The housing has three connectors :
- ECU channel A.
-ECU channel B.
-EVMU.
EFG
CTC-201-048-02
EFFECTIVITY
SENSORS Page 11
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ENGINE SENSORS
RTD type sensors.
Resistive Thermal Devices (RTD) are installed on the engine at aerodynamic stations 12 and 25.
They operate in the same manner. The ECU determines the air temperature by monitoring the electrical resistance value of the sensing element.
The sensing element is located in the probe housing, which is inserted in the airstream and is made of a ceramic core wrapped with a platinum wire.
As the airflow heats the element, the electrical resistance of the element varies. If the air temperature increases, the resistance of the element increases and vice versa.
The ECU determines the resistance by sending an electrical excitation signal through the element and measuring the voltage drop that results.
A unique voltage drop is developed for every possible air temperature within the operational range of the sensor.
EFFECTIVITY
SENSORS Page 12
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03
CFMI PROPRIETARY INFORMATION
EFG
.
CTC-201-049-02
EFFECTIVITY
SENSORS Page 13
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ENGINE SENSORS
T12 sensor.
The T12 temperature sensor measures the fan inlet temperature and is installed through the fan inlet case, at the 1 o’clock position. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：TRAINING MANUAL CFM56-5B ENGINE SYSTEMS 培训手册 CFM56-5B 发动机系统(17)
