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The oil temperature sensor transmits the engine oil temperature to the aircraft indicating system and is installed on the engine lubrication unit.
A sensing probe transforms the oil temperature into an electrical signal, routed through a connector.
This connection links the probe to the aircraft indicating system and the cockpit, where the information is displayed.
In case of a problem with this oil temperature sensor, the A/C system is able to use information from the TEO sensor as a backup signal. The opposite is not possible.

The oil temperature sensor consists of a dual probe body immersed in the lube unit oil flow.
Each probe features a platinum sensing element (thermistor), electrically insulated from ground. When the engine oil temperature changes, the probes resistance changes.
The oil temperature sensor has:
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A flange, designed for one-way installation.

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A straight connector, providing the electrical interface between the sensor and the A/C, through an electrical harness.

 

EFG
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OIL TEMPERATURE SENSOR
CTC-201-207-01
EFFECTIVITY
79-32-00 Page 3
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
THIS PAGE INTENTIONALLY LEFT BLANK

EFG
OIL PRESSURE TRANSMITTER AND OIL LOW PRESSURE SWITCH

EFFECTIVITY
79-33-00 Page 1
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG OIL PRESSURE TRANSMITTER AND OIL LOW PRESSURE SWITCH
The oil pressure transmitter and oil low pressure switch transmit information to the aircraft systems for cockpit indication and oil system monitoring.
They are installed on the left handside of the engine fan case, above the oil tank, at about the 9 o’clock position.
They have 2 connecting tubes and 2 electrical connections:
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One tube to the forward sump oil supply line.

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One tube to the vent circuit, through the oil tank.

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One connection to the aircraft indicating systems.

- One connection to the Flight Warning Computer
(FWC).

EFG
OIL PRESSURE
TRANSMITTER

OIL LOW PRESSURE SWITCH

OIL PRESSURE TRANSMITTER AND LOW PRESSURE SWITCH
CTC-201-210-01
EFFECTIVITY
79-33-00 Page 3
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG OIL PRESSURE TRANSMITTER AND OIL LOW PRESSURE SWITCH
An oil pressure signal, from the forward sump supply line, is applied on one side of the transmitter, and vent circuit pressure from the oil tank is applied on the other side.
　
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