Entry of the Engine Serial Number Through MCDU [CFMB]

TASK 73-21-60-740-008-A
Entry of the Engine Serial Number Through MCDU

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-32-00-860-012-A	Procedure to Get Access to the SYSTEM REPORT/TEST/ENG Page
Serial Number Entry - MCDU Screens

3. Job Set-up
Subtask 73-21-60-861-059-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 73-21-60-869-062-A ** ON A/C NOT FOR ALL

B. Preparation for test
(1) On the overhead maintenance panel 50VU, push then release the ENG/FADEC GND PWR/1(2) pushbutton switch. The ON legend comes on.
(2) On the left or right MCDU get the SYSTEM REPORT/TEST ENG page (Ref. AMM TASK 31-32-00-860-012).

4. Procedure
Subtask 73-21-60-740-055-B ** ON A/C NOT FOR ALL

A. Do this procedure for the ECU 1(2) channel A.

NOTE: This test is for the system 1. For the other system(s), use the indications between the parentheses.

ACTION	RESULT
1.On the MCDU:
Push the line key adjacent to the FADEC 1A (2A) indication.	The ENGINE 1(2) MAIN MENU page comes into view.
2.Push the line key adjacent to the LRU IDENT REPORT indication.	The LRU IDENTIFICATION page comes into view. If there is a NVM failure, the NVM FAULT: DATA NOT RETRIEVABLE indication comes into view.
3.Push the line key adjacent to the CONFIGURATION CHANGE indication.
4.Push the line key adjacent to the ENGINE S/N CHANGE indication.	The SERIAL NUMBER ENTRY menu comes into view.
5.On the MCDU keyboard, enter the engine serial number (6 digits).	The serial number comes into view under the RETURN indication.
6.Push the line key adjacent to the engine serial number indication.	The serial number goes out of view under the RETURN indication and comes into view under the ENTER NEW S/N indication.

NOTE: If a pre-SB CFM56-5B 72-108 engine serial number plug (which supplies the engine serial number from the plug) is installed in the ECU, the ECU will permit entry of the engine serial number, but will not save the serial number. When power is removed from the ECU and later is applied again to the ECU, the serial from the engine identification plug will be used and displayed.

(1) On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
(2) Stop the MCDU.

5. Close-up
Subtask 73-21-60-860-060-A ** ON A/C NOT FOR ALL

A. On the overhead maintenance panel 50VU:

Push the ENG/FADEC GND PWR 1(2) pushbutton switch. The ON legend goes off.

Subtask 73-21-60-862-059-A ** ON A/C NOT FOR ALL

B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 12:55:16 UTC