Installation of the Fire Detector (Channel B) Harness [CFMB]

TASK 71-51-43-400-003-A
Installation of the Fire Detector (Channel B) Harness

FIN: 4203KS ** 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. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2739)	tape

C. Work Zones and Access Panels

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

D. 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 26-12-00-710-002-A	Operational Test of the Engine Fire and Overheat Detection with the Centralized Fault Display System (CFDS)
TASK 26-12-00-710-002-B	Operational Test of the Engine Fire and Overheat Detection with the Centralized Fault Display System (CFDS)
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
Fire Detector Channel B Harness (PRE SB RA32071-139) ** ON A/C NOT FOR ALL
Fire Detector Channel B Harness (POST SB RA32071-139)
Fire Detector Channel B Harness (POST SB RA32071-139)
Fire Detector Channel B Harness (POST SB RA32071-139) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 71-51-43-860-084-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 71-51-43-010-077-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowls 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 71-51-43-865-087-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	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 71-51-43-420-062-B ** ON A/C NOT FOR ALL

A. Installation of the Fire Detector (Channel 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.
(2) Put the electrical harness (5) in position on the engine.
(3) Connect the electrical connector 409VC-A to the pylon junction box.

Fire Detector Channel B Harness (PRE SB RA32071-139) ** ON A/C NOT FOR ALL

Fire Detector Channel B Harness (POST SB RA32071-139) ** ON A/C NOT FOR ALL

(4) Put the harness (5) into the rubber supports of the line blocks (10) and the flip-lock clamp (15) on the top RH side of the engine.
(5) Make sure that the harness (5) is correctly installed on the engine.
(6) Tighten the flip-lock clamp (15) captive screw.
(7) Put the rubber supports in the line blocks (10). Close the line blocks and tighten the captive bolts.

BEFORE SPIB NO. CFM02255MW1

(8) Put the harness (5) into the rubber supports of the line blocks (10), (20) and (25) near the top LH side of the engine.

Fire Detector Channel B Harness (PRE SB RA32071-139) ** ON A/C NOT FOR ALL

Fire Detector Channel B Harness (POST SB RA32071-139) ** ON A/C NOT FOR ALL

(9) Put the rubber supports in the line blocks (10) at station 174, line block (20) at station 176 and line block (25) at station 185.
(10) Make sure that the harness (5) is correctly installed on the engine.
(11) Close the line blocks (10), (20) and (25) and tighten the captive bolts.
(12) Put the harness (5) into the flip-lock clamps (30) and the rubber support of the line block (35) at station 191.
(13) If removed, put the rubber support in the line block (35).
(14) Close the line block (35) and tighten the captive bolt.
(15) Tighten the captive screws on the flip-lock clamps (30).
(16) Put the harness (5) into the rubber supports of the two line blocks (35) at station 191 and station 199.

Fire Detector Channel B Harness (PRE SB RA32071-139) ** ON A/C NOT FOR ALL

Fire Detector Channel B Harness (POST SB RA32071-139) ** ON A/C NOT FOR ALL

AFTER SPIB NO. CFM02255MW2

Fire Detector Channel B Harness (PRE SB RA32071-139) ** ON A/C NOT FOR ALL

Fire Detector Channel B Harness (POST SB RA32071-139) ** ON A/C NOT FOR ALL

(17) If removed, put the rubber supports in the line blocks (35) and (50).
(18) Make sure that the harness (5) is correctly installed on the engine.
(19) Close the line blocks (35) and (50) and tighten the captive bolts.
(20) Put the harness (5) into the rubber supports of the line blocks (10) near the top LH side of the engine.

Fire Detector Channel B Harness (PRE SB RA32071-139) ** ON A/C NOT FOR ALL

Fire Detector Channel B Harness (POST SB RA32071-139) ** ON A/C NOT FOR ALL

(21) Put the rubber supports in the line blocks (10) at station 174.
(22) Make sure that the harness (5) is correctly installed on the engine.
(23) Close the line blocks (10) and tighten the captive bolts.
(24) Install the bolt and clamps (22) that attach the harness (5) at station 176.
(25) Install the bolt and clamps (27) that attach the harness (5) to the bracket at station 185.
(26) Install the nuts, bolts and clamps (32) that attach the harness (5) to the brackets at station 191.
(27) Install the harness (5) into the flip-lock clamp (30) at station 191 and tighten the captive bolt.
(28) Install the bolt and clamps (37) that attach the harness (5) to the bracket at station 191.
(29) Install the bolt, clamps and anti-rotation lug (38) that attach the harness (5) to the bracket at station 199.

Fire Detector Channel B Harness (PRE SB RA32071-139) ** ON A/C NOT FOR ALL

Fire Detector Channel B Harness (POST SB RA32071-139) ** ON A/C NOT FOR ALL

(30) Put the clamp (85) on the harness (5). Attach the clamp (85) to the bracket at station 199 with the bolt (70), the washer (75), and the nut (80).
(31) Put the clamp (85) on the harness (5). Attach the clamp (85) to the bracket at station 191 and station 199 with the bolt (90).
(32) Make sure that the harness (5) is correctly installed on the engine.

END SPIB NO. CFM22255MW1

(33) Put the clamps (55) on the harness (5). Attach the clamps to the brackets at station 199 with the bolts (40).
(34) Put the clamp (55) on the harness (5). Attach the clamp to the bracket on tube flange with the bolt (40).
(35) Put the clamp (55) on the harness (5). Attach the clamp to the bracket at fuel control flange with the bolt (40).
(36) Put the clamp (55) on the harness (5). Attach the clamp to the bracket on gearbox with the bolts (40) and nut (65).
(37) TORQUE the bolts (40) and (60) and the nut (65) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

.
(38) Connect the electrical connector 4000WD2-A to the fire detector loop B.
(39) Examine the harness installation and make sure that the flip-lock clamps and the line blocks are installed correctly.

POST SB RA32071-139

(40) Applying of the tape.

CAUTION: YOU MUST WIND THE TWO HARNESSES WITH TAPE (CP 2739) IF THEY TOUCH. IF YOU DO NOT WIND THE HARNESSES WITH TAPE IT CAN DAMAGE THE HARNESSES.

(a) Wind the tape (Material No.CP2739) 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.

END SB RA32071-139

Subtask 71-51-43-865-088-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 71-51-43-861-059-A ** ON A/C NOT FOR ALL

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

Subtask 71-51-43-860-080-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 71-51-43-710-056-A ** ON A/C NOT FOR ALL

E. Do an operational test of the engine fire and overheat detection (Ref. AMM TASK 26-12-00-710-002).

5. Close-up
Subtask 71-51-43-862-059-A ** ON A/C NOT FOR ALL

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

Subtask 71-51-43-410-062-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 07:30:20 UTC