EFG
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CTC-201-008-00
EFFECTIVITY
73-21-60 Page 7
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ELECTRONIC CONTROL UNIT
Engine Rating / Identification Plug.
The engine rating/identification plug provides the ECU with engine configuration information for proper engine operation.
It is plugged into connector J14 and attached to the fan case by a metal strap. It remains with the engine even after ECU replacement.
The plug includes a coding circuit, soldered to the plug connector pins. It is equipped with fuse and push-pull links which either ensure, or prohibit connections between the different plug connector pins.
The ECU stores schedules, in its Non-Volatile Memory (NVM), for all available engine configurations. During initialization, it reads the plug by looking for voltages on certain pins. Depending on the location and voltage present at specific pins, the ECU will select a specific schedule.
In the case of a missing, or invalid ID plug, the ECU uses the value stored in the NVM for the previous plug configuration.
EFG
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CTC-201-009-01
EFFECTIVITY
73-21-60 Page 9
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
ELECTRONIC CONTROL UNIT
Coding Circuit.
The ID plug is equipped with fuse and push-pull links.
Fuse links :
Fuse links provide the ECU with thrust information at power up. They are made by metallization of an area between two contacts of the coding circuit. Closed by design, these links can only be opened by burning them out, thus their reconfiguration is not possible.
Certified thrust ratings :
By design, all 5B engines can produce a take-off thrust
of 32000 lbs.
Specific contacts within the identification plug enable
various thrust ratings, which are :
-B1 : 30000 lbs A321.
-B2 : 31000 lbs A321.
-B3 : 33000 lbs A321.
-B4 : 27000 lbs A320.
-B5 : 22000 lbs A319.
-B6 : 23500 lbs A319.
Bump selection :
Bump is an option provided to achieve power levels
greater than the normal take-off levels within specific
limitations.
Specific bump rating capabilities may be set by the
engine identification plug.
A bump rating, when installed, may be selected, or
de-selected, by actuating a push-button on the throttle
lever.
The bump rating does not influence power levels which
are at, or below Max Continuous Thrust (MCT).
For any available bump, the redline values (N1, N2, EGT)
remain identical to the baseline rating.
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