CENTRALIZED FAULT DISPLAY SYSTEM (CFDS). ENGINE SYSTEMS - ECU.
LRU identification - S/N & TRSOV status change.
If the ECU has been changed, or moved to another engine, the engine serial number may be changed through the MCDU. The S/N must correspond to that engraved on the Engine Dataplate, riveted on the fan frame.
When ‘CONFIGURATION CHANGE’ is selected from the LRU identification page, a sub-menu appears that allows the operator to select either engine S/N change, or TRSOV status change.
If the operator selects ‘ENGINE S/N CHANGE’, a new sub-menu is displayed that allows the operator to enter six digits from the keypad. When the new S/N has been entered, the operator presses the corresponding line select key and a new screen appears informing the operator that the S/N entry has been accepted.
If the number was wrongly entered (incorrect number of digits, or a letter accidentally keyed), a different screen will be displayed informing the operator that a mistake was made and allowing the correct number to be re-entered. Once the correct number has been entered, the ECU stores it in both channels. The LRU identification menu will then display the new S/N.
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
CTC-231-077-00 S/N AND TRSOV STATUS CHANGE
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION CFDS MESSAGE
INTERROGATION
FAULT DETECTION
& ANNUNCIATION Page 25
Nov 02
CFM56-5B TRAINING MANUAL
CENTRALIZED FAULT DISPLAY SYSTEM (CFDS). ENGINE SYSTEMS - ECU.
Troubleshooting report.
This report provides a snapshot of certain parameters recorded at the time the fault first appeared and is used as an aid in troubleshooting.
Each report has 2 pages and data for a maximum of 12 class 1 & 2 faults recorded over the last 64 flight legs may be displayed.
Troubleshooting data is displayed in reverse chronological order, i.e. last event first.
The display shows the fault message and the normal mode message, followed by the flight leg number, date, time, and ATA number.
The number of occurrences (1 to 4) and the ECU designation are shown followed by the values of selected parameters.
If no troubleshooting data is available, a ‘NO FAULTS RECORDED’ message is displayed.
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
CENTRALIZED FAULT DISPLAY SYSTEM (CFDS). ENGINE SYSTEMS - ECU.
Class 3 report.
The Class 3 report has the same format as the ‘Last leg report’, except that there is no flight leg, or date information.
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