Tool :
When pulled, this link enables the engine serial number to be loaded into the ECU’s NVM, through test connector J15. This operation requires the CFM ENGINE SERIAL NUMBER PROGRAMMER.
Note: with a new type plug, programming of the serial number is now possible through a flight deck MCDU.
EGT monitoring :
This option provides thorough EGT monitoring.
Class 2 or class 1 messages are displayed, according to
various EGT thresholds stored in the ECU’s NVM.

EFG

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CTC-201-012-02
EFFECTIVITY
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Pressure Sub-system.
Five pneumatic pressure signals are supplied to the ECU pressure sub-system.
Transducers inside the pressure sub-system convert these pneumatic signals into electrical signals.
The three pressures used for engine control (P0, PS12, PS3) are supplied to both channels.
The two optional monitoring pressures are supplied to a single channel :
- PS13 is dedicated to channel A.
-P25 is dedicated to channel B.

EFG
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CTC-201-013-01
EFFECTIVITY

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CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG

ELECTRONIC CONTROL UNIT
Pressure sub-system interfaces.
The shear plate serves as an interface between the pneumatic lines and the ECU pressure sub-system.
The three control pressures are divided into channel A and channel B signals by passages inside the shear plate, which is bolted on the ECU chassis.
Individual pressure lines are attached to connectors on the shear plate. The last few inches of the pressure lines are flexible to facilitate ECU removal and installation.
The shear plate is never removed during line maintenance tasks.
When the optional monitoring kit (PMUX) is not required, P25 and PS13 ports are blanked off, and the two dedicated transducers are not installed in the ECU.

EFG

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CTC-201-014-02
EFFECTIVITY

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ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03

CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG

ELECTRONIC CONTROL UNIT
ECU power supply. Control Alternator.
The ECU is provided with redundant power sources to The control alternator provides two separate power ensure an uninterrupted and failsafe power supply. sources from two independent windings.
　
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