Installation of the Thrust Reverser (Channel A and B) Harness [CFMB]

TASK 71-51-43-400-044-A
Installation of the Thrust Reverser (Channel A and B) Harness

FIN: 4200KS ** 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 25 and 20 lbf.in (0.28 and 0.23 m.daN )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

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 31-60-00-860-001-A	EIS Start Procedure
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 78-31-00-710-042-A	Operational Test of the Thrust Reverser System
Upper Right Fan Zone Thrust Reverser Harness

3. Job Set-up
Subtask 71-51-43-860-056-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 71-51-43-010-068-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)
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 71-51-43-865-063-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 71-51-43-420-054-B ** ON A/C NOT FOR ALL

A. Installation of the Thrust Reverser (Channel A and B) Harness

NOTE: 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, turn the captive screws or captive bolts 1/4 turn clockwise to engage the cam nuts.

(1) Remove the protective covers from the electrical connectors on the harness (30), the hydraulic control unit, and the thrust reverser junction box.
(2) Put the electrical harness (30) in position on the engine.
(3) Connect the electrical connectors 4101KS-A, 4101KS-B and 4102KS-A to the hydraulic control unit. Tighten the connectors with your hand plus one-eighth turn.
(4) Put the clamp (65) on the harness for connector 4101KS-B.
(5) Attach the clamps (65) and (70) to the bracket on the HCU with the screw (55) and nut (60).
(6) TORQUE the nut (60) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

.

BEFORE SPIB NO. CFM02255MW1

(7) Put the electrical harness (30) into the rubber supports and the flip-lock clamps (5), (10) and (40).
(8) Put the rubber supports in the line blocks (35).
(9) Attach the junction box part of the harness (30) to the bracket with the bolts (25), the washers (20) and the nuts (15).
(10) TORQUE the nuts (15) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

.
(11) Connect the electrical connectors 4003VC, 4004VC, 4006VC and 4007VC to the junction box. Tighten the connectors with your hand plus one-eighth turn.
(12) Make sure that the harness (30) is correctly installed on the engine.
(13) Close the line blocks (35) and tighten the captive bolts.
(14) Tighten the captive screws on the flip-lock clamps (5), (10) and (40).

AFTER SPIB NO. CFM02255MW1

(15) Put the electrical harness (30) into the rubber support and the flip-lock clamp (5).
(16) Put the rubber support in the line block (35).
(17) Put the bolts and clamps (12) and (42) on the electrical harness (30) and install on the engine brackets.
(18) Put the bolts, anti-rotation lug and clamps (37) on the electrical harness (30) and install on the engine brackets.
(19) Attach the junction box part of the harness (30) to the bracket with the bolts (25), the washers (20) and the nuts (15).
(20) TORQUE the nuts (15) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

.
(21) Connect the electrical connectors 4003VC, 4004VC, 4006VC and 4007VC to the junction box. Tighten the connectors with your hand plus one-eighth turn.
(22) Make sure that the harness (30) is correctly installed on the engine.
(23) TORQUE the bolts (12) and (42) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

.
(24) TORQUE the bolts (37) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

.
(25) Close the line blocks (35) and tighten the captive bolts.
(26) Tighten the captive screws on the flip-lock clamps (5).

END SPIB NO. CFM02255MW1

(27) On the top left side of the engine, connect the electrical connectors 4100KS-A and 4100KS-B to the thrust reverser junction box. Tighten the connectors with your hand plus one-eighth turn.
(28) Attach the harness (30) to the bracket with the clamp (50) and the bolt (45).
(29) TORQUE the bolt (45) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

.
(30) Put the harness into the flip-lock clamps (5) and tighten the captive screws.

Subtask 71-51-43-865-064-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 71-51-43-861-051-A ** ON A/C NOT FOR ALL

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

Subtask 71-51-43-860-057-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 71-51-43-710-050-A ** ON A/C NOT FOR ALL

E. Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-042) .

5. Close-up
Subtask 71-51-43-862-051-A ** ON A/C NOT FOR ALL

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

Subtask 71-51-43-410-054-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls: (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