Entry of the Engine Serial Number (ESN) (Menu Mode) [CFML]

TASK 73-29-00-740-810-A
Entry of the Engine Serial Number (ESN) (Menu Mode)

ZONE: 400

1. Reason for the Job
The Engine Serial Number (ESN) entry function allows users to manually change the ESN stored in the EECs. This task should be performed whenever an EEC channel is reprogrammed or replaced on the engine.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS

C. 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
Engine Serial Number (ESN)

3. Job Set-up
Subtask 73-29-00-861-077-A

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

Subtask 73-29-00-941-073-A

B. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 73-29-00-865-090-A

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41

Subtask 73-29-00-860-110-A

D. Aircraft Maintenance Configuration
(1) On the ENG section of maintenance panel 50VU:

Push the FADEC GND PWR 1(2) pushbutton switch (the ON legend comes on).

(2) After the FADEC is energized, wait ten seconds before you start the test. If you do not wait ten seconds, the interactive mode stops the EEC self-test and this can cause unwanted faults.
(3) On the left or right Multipurpose Control and Display Unit (MCDU), get the SYSTEM REPORT/TEST/ENG page (Ref. AMM TASK 31-32-00-860-012).
(4) Make sure that the landing gear system is not simulated in the flight configuration.

4. Procedure
Subtask 73-29-00-710-081-A

A. Do the ESN Entry Task via the Menu Mode

NOTE: After selecting the MCDU button, it may take approximately ten seconds to transition to the next Menu Mode screen. The ESN entry task function takes approximately two minutes to complete.

NOTE: Obey the instructions shown on the MCDU.

NOTE: The EEC will not enter the menu mode (interactive mode) after an enquire command from the CFDS (Centralized Fault Display System) when any of the following conditions are set:

N2 more than ten percent or invalid
Rotary selector on CRANK or IGN/START or invalid
Manual Start Button on ON or invalid
TLA (Throttle Lever Angle) not at idle or invalid
Aircraft in the air
MASTER lever ON or invalid
BITE command code input label invalid.

ACTION	RESULT
1.From the Menu Mode main page, push the key adjacent to LRU IDENT report (3L).	The LRU IDENTIFICATION page is shown.
2.From the LRU IDENTIFICATION page, select the key adjacent to ENGINE S/N CHANGE (5R).	The SERIAL NUMBER ENTRY is shown. See sheet 1 of the figure. Engine Serial Number (ESN)
3.On the Serial Number Entry screen: NOTE: F" = 1 digit engine designation (1 or 2), C" = 1 letter EEC channel designation (A or B)	If the serial number data has an incorrect number of engine characters entered, "INCORRECT SERIAL NUMBER ENTERED" will be shown. See sheet 2 of the figure. Engine Serial Number (ESN)
Enter the 6-digit ESN. Push in the key adjacent to the ENTER NEW SERIAL NUMBER (5R).	If the serial number data is correct, "SERIAL NUMBER ENTRY ACCEPTED" will be shown. See sheet 3 of the figure. Engine Serial Number (ESN) If there is an issue with EEC NVM, "ECU NVM ERROR, NO S/N ENTRY POSSIBLE" will be shown.
4.Select the key adjacent to RETURN (6L) to return to the Main Menu.

5. Close-up
Subtask 73-29-00-860-111-A

A. Put the aircraft back to its initial configuration.
(1) On the ENG section of the maintenance panel 50VU:
(a) Release the FADEC GND PWR 1(2) pushbutton switch.

The ON legend goes off.

(2) Remove the WARNING NOTICE(S).

Subtask 73-29-00-862-077-A

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

[Rev.10 from 2021] 2026.04.01 03:06:10 UTC