Installation of the Electronic Control Unit (ECU) (Channel A) Harness [CFMB]

TASK 71-51-43-400-046-A
Installation of the Electronic Control Unit (ECU) (Channel A) Harness

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 400
FIN: 4211KS ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 30 and 25 lbf.in (0.34 and 0.28 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2740)	tape, hi temp
(Material No.CP5085)	tape, tying, glass fiber

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 22-97-00-710-001-A	Operational Test of the LAND CAT III Capability
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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 34-10-00-860-004-A	Inertial Reference (IR) Alignment-Procedure
TASK 34-10-00-860-004-A-01	Automatic Inertial Reference (IR) Alignment-Procedure
TASK 34-10-00-860-004-A-02	Inertial Reference (IR) Alignment-Procedure to do a Check of the Links between each Flight Management and Guidance Computer (FMGC) and the three Air Data/Inertial Reference Units (ADIRUs)
TASK 70-60-00-910-041-A	Nacelle Maintenance Practices
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 73-21-60-720-040-B	Functional Test of the Electronic Control Unit (ECU)
ECU Channel A Harness - Upper Right Fan Zone (PRE SB RA32071-131) ** ON A/C NOT FOR ALL
ECU Channel A Harness - Lower Right Fan Zone (PRE SB RA32071-131) ** ON A/C NOT FOR ALL
ECU Channel A Harness - Upper Right Fan Zone (POST SB RA32071-131) ** ON A/C NOT FOR ALL
ECU Channel A Harness - Lower Right Fan Zone (POST SB RA32071-131) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 71-51-43-860-062-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 71-51-43-010-070-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.

Subtask 71-51-43-865-069-A ** ON A/C NOT FOR ALL

WARNING: OPEN THE PROBE HEATER CIRCUIT-BREAKERS 1DA1(2), 3DA1(2,3), 4DA1(2,3) AND 5DA1(2,3) BEFORE ENG1(2)FADEC A and EIU 1(2) C/B'S 2KS1 AND 2KS2. IF YOU DO NOT OBEY THIS SEQUENCE:

THE PROBES WILL BECOME TOO HOT.
THIS CAN CAUSE DAMAGE TO EQUIPMENT AND INJURY TO MAINTENANCE PERSONNEL.

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/CVR/SPLY	2RK	E14
49VU	COM/CVR/CTL	4RK	E13
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
49VU	ANTI ICE/PROBES/AOA/1	4DA1	D04
49VU	ANTI ICE/PROBES/PITOT/1	3DA1	D02
** ON A/C NOT FOR ALL
49VU	ANTI ICE/RAIN/RPLNT/CAPT	1DB1	D01
** ON A/C NOT FOR ALL
49VU	COM/CVR/SPLY	23RK	E14
49VU	COM/CVR/CTL	26RK	E13
** ON A/C NOT FOR ALL
121VU	RCDR/DFDR	7TU	K16
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
122VU	ANTI ICE/WINDOWS/R	4DG2	W14
122VU	ANTI ICE/WINDOWS/L	4DG1	X14
122VU	ANTI ICE/PROBES/2/PITOT	3DA2	Y14
122VU	ANTI ICE/PROBES/2/AOA	4DA2	Y13
122VU	ANTI ICE/PROBES/2/STATIC	5DA2	Y11
122VU	ANTI ICE/PROBES/3/PITOT	3DA3	Z16
122VU	ANTI ICE/PROBES/3/AOA	4DA3	Z15
122VU	ANTI ICE/PROBES/3/STATIC	5DA3	Z14
122VU	ANTI ICE/PROBES/1/STATIC	5DA1	Z13
** ON A/C NOT FOR ALL
122VU	ANTI ICE/RAIN/RPLNT/F/O	1DB2	W11
** ON A/C NOT FOR ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03
FOR FIN: 1000EM1 (ENGINE1)
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
122VU	ELEC/GCU/1	2XU1	T26
FOR FIN: 1000EM2 (ENGINE2)
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE2	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39
122VU	ELEC/GCU/2	2XU2	T27

4. Procedure
Subtask 71-51-43-420-056-A ** ON A/C NOT FOR ALL

A. Installation of the Electronic Control Unit (ECU) (Channel A) Harness
For the recommended procedure for the installation of the wire harness (Ref. AMM TASK 70-60-00-910-041).

NOTE: To tighten the flip-lock clamps and line blocks, you can turn the captive screws or captive bolts 1/4 turn clockwise to engage the cam nuts.

(1) Remove the COVER - PROTECTION from the electrical connectors.
(2) Put the electrical harness (5) in position on the engine.
(3) Connect electrical connectors 402VC-A and 406VC-A to the pylon junction box.

ECU Channel A Harness - Upper Right Fan Zone (PRE SB RA32071-131) ** ON A/C NOT FOR ALL

ECU Channel A Harness - Upper Right Fan Zone (POST SB RA32071-131) ** ON A/C NOT FOR ALL

(4) Connect electrical connector 4004VC-A to the junction box at flange station 167 (B2).
(5) Put the harness (5) into the flip-lock clamp (10).
(6) Put the harness (5) into the rubber supports of the line blocks.

BEFORE SPIB NO. CFM02255MW1

(7) Put the rubber supports in the line blocks (15), (20) and (25) attached to the brackets at flange station 158 (B1).

CONFIG-1

(8) Put the rubber support into the line block (30) attached to the bracket at flange station 167 (B2).

END OF CONFIG-1

CONFIG-2

ECU Channel A Harness - Upper Right Fan Zone (PRE SB RA32071-131) ** ON A/C NOT FOR ALL

ECU Channel A Harness - Upper Right Fan Zone (POST SB RA32071-131) ** ON A/C NOT FOR ALL

(Detail B)
(9) Put the clamp (60) on the harness (5). Use the bolt (55) to attach the clamp (60) to the bracket at flange station 167 (B2).
(10) TORQUE the bolt (55) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN )

.

END OF CONFIG-2

(11) Put the harness (5) into the rubber supports of the line blocks (25), (40), (45) and (50).

ECU Channel A Harness - Lower Right Fan Zone (PRE SB RA32071-131) ** ON A/C NOT FOR ALL

ECU Channel A Harness - Lower Right Fan Zone (POST SB RA32071-131) ** ON A/C NOT FOR ALL

(12) Put the rubber supports in the line blocks (25), (40), (45) and (50).
(13) Make sure that the harness (5) is correctly installed on the engine.
(14) Close the line blocks and tighten the captive bolts.
(15) Put the harness (5) into the flip-lock clamp (35) and tighten the captive screw.

AFTER SPIB NO. CFM02255MW1

ECU Channel A Harness - Upper Right Fan Zone (PRE SB RA32071-131) ** ON A/C NOT FOR ALL

ECU Channel A Harness - Upper Right Fan Zone (POST SB RA32071-131) ** ON A/C NOT FOR ALL

(16) Put the rubber supports in the line blocks (25) attached to the brackets at flange station 158 (B1).
(17) Put the bolt and clamps (17) that attach the harness (5) to the bracket at flange station 158 (B1).
(18) Put the bolts and clamps (22) that attach the harness (5) to the bracket at flange station 158 (B1).

CONFIG-1

(19) Put the rubber support into the line block (30) attached to the bracket at flange station 167 (B2).

END OF CONFIG-1

CONFIG-2

ECU Channel A Harness - Upper Right Fan Zone (PRE SB RA32071-131) ** ON A/C NOT FOR ALL

ECU Channel A Harness - Upper Right Fan Zone (POST SB RA32071-131) ** ON A/C NOT FOR ALL

(Detail B)
(20) Put the clamp (60) on the harness (5). Use the bolt (55) to attach the clamp to the bracket at flange station 167 (B2).
(21) TORQUE the bolt (55) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN )

.

END OF CONFIG-2

(22) Put the harness (5) into the rubber supports of the line blocks (25), (40), (45) and (50).

ECU Channel A Harness - Lower Right Fan Zone (PRE SB RA32071-131) ** ON A/C NOT FOR ALL

ECU Channel A Harness - Lower Right Fan Zone (POST SB RA32071-131) ** ON A/C NOT FOR ALL

(23) Put the rubber supports in the line blocks (25), (40), (45) and (50).
(24) Make sure that the harness (5) is correctly installed on the engine.
(25) Close the line blocks and tighten the captive bolts.
(26) Put the bolt, clamp and anti-rotation lug (37) on the harness (5) and install on the engine bracket near ignition exciter A.
(27) TORQUE the bolts (17), (22) and (37) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN )

.

END OF SPIB NO. CFM02255MW1

(28) Connect electrical connector 4000JH1-A to ignition exciter A.
(29) Connect electrical connectors 4000KS-J1 and 4000KS-J3 to the ECU.

NOTE: The wire harness for connectors 4000KS-J1 and 4000KS-J3 may touch as shown on the figure.

ECU Channel A Harness - Lower Right Fan Zone (PRE SB RA32071-131) ** ON A/C NOT FOR ALL

ECU Channel A Harness - Lower Right Fan Zone (POST SB RA32071-131) ** ON A/C NOT FOR ALL

(30) Examine the harness installation and make sure that all the flip-lock clamps and line blocks are installed correctly.

POST SB RA32071-131

(31) Apply the tape:

CAUTION: IF THE TWO HARNESSES TOUCH, YOU MUST WIND THEM WITH TAPE (CP2740). IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE HARNESSES CAN OCCUR.

(a) Wind CP2740tape, hi temp on the two harnesses in the areas shown:
1 Wind the tape so that each wind overlaps the last wind by half the width of the tape.
(32) Apply the tape:

CAUTION: YOU MUST WIND THE TWO HARNESSES WITH TAPE (CP2740) AND ATTACH THE HARNESSES TOGETHER WITH TYING TAPE (CP5085). IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE HARNESSES CAN OCCUR.

(a) Wind CP2740tape, hi temp on the two harnesses in the areas shown:
1 Wind the tape so that each wind overlaps the last wind by half the width of the tape.
(b) Attach the two harnesses together with CP5085tape, tying, glass fiber:
1 Make a clove hitch tie around the two harnesses and pull tight with a firm steady pull.
2 Make a square knot with an extra loop to finish the tie.

END OF SB RA32071-131

Subtask 71-51-43-865-070-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/CVR/SPLY	2RK	E14
49VU	COM/CVR/CTL	4RK	E13
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
49VU	ANTI ICE/PROBES/AOA/1	4DA1	D04
49VU	ANTI ICE/PROBES/PITOT/1	3DA1	D02
** ON A/C NOT FOR ALL
49VU	ANTI ICE/RAIN/RPLNT/CAPT	1DB1	D01
** ON A/C NOT FOR ALL
49VU	COM/CVR/SPLY	23RK	E14
49VU	COM/CVR/CTL	26RK	E13
** ON A/C NOT FOR ALL
121VU	RCDR/DFDR	7TU	K16
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
122VU	ANTI ICE/WINDOWS/R	4DG2	W14
122VU	ANTI ICE/WINDOWS/L	4DG1	X14
122VU	ANTI ICE/PROBES/2/PITOT	3DA2	Y14
122VU	ANTI ICE/PROBES/2/AOA	4DA2	Y13
122VU	ANTI ICE/PROBES/2/STATIC	5DA2	Y11
122VU	ANTI ICE/PROBES/3/PITOT	3DA3	Z16
122VU	ANTI ICE/PROBES/3/AOA	4DA3	Z15
122VU	ANTI ICE/PROBES/3/STATIC	5DA3	Z14
122VU	ANTI ICE/PROBES/1/STATIC	5DA1	Z13
** ON A/C NOT FOR ALL
122VU	ANTI ICE/RAIN/RPLNT/F/O	1DB2	W11
** ON A/C NOT FOR ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03
FOR FIN: 1000EM1 (ENGINE1)
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
122VU	ELEC/GCU/1	2XU1	T26
FOR FIN: 1000EM2 (ENGINE2)
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE2	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39
122VU	ELEC/GCU/2	2XU2	T27

Subtask 71-51-43-861-053-A ** ON A/C NOT FOR ALL

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

Subtask 71-51-43-860-063-A ** ON A/C NOT FOR ALL

D. Do the EIS start procedure (for the lower display of the ECAM system only). (Ref. AMM TASK 31-60-00-860-001).

Subtask 71-51-43-720-050-A ** ON A/C NOT FOR ALL

E. Do a functional test of the ECU (Ref. AMM TASK 73-21-60-720-040) .

Subtask 71-51-43-710-065-A ** ON A/C NOT FOR ALL

F. If you operate the aircraft in actual CAT III conditions, do these tests:

Make sure that there is no CAT 3 DUAL INOP message on the lower ECAM DU of the maintenance panel 50VU with FADEC GND PWR 1 & 2 pushbutton switches pushed (ON legends on) and 3 IR'S aligned (Ref. AMM TASK 34-10-00-860-004)
Do the operational test of the LAND CAT III Capability (Ref. AMM TASK 22-97-00-710-001).

5. Close-up
Subtask 71-51-43-860-064-A ** ON A/C NOT FOR ALL

A. Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002)

Subtask 71-51-43-862-053-A ** ON A/C NOT FOR ALL

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

Subtask 71-51-43-410-056-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 07:30:18 UTC