DOC AIRBUS | AMM A320FInstallation of the CJ12L Harness [CFMI]
TASK 73-21-50-400-003-A
Installation of the CJ12L Harness
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 73-21-50-860-074-A ** ON A/C NOT FOR ALL
Subtask 73-21-50-420-093-A ** ON A/C NOT FOR ALL
Subtask 73-21-50-862-052-A ** ON A/C NOT FOR ALL Subtask 73-21-50-410-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:05:00 UTC
Installation of the CJ12L Harness
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2101) | graphite grease |
| (Material No.CP8001) | lockwire 0.032 in. (0.8 mm) dia. |
| (Material No.CP8002) | lockwire 0.032 in. (0.8 mm) dia |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL | |
| 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 71-13-00-010-040-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-A | Closing of the Fan Cowl Doors |
| TASK 73-29-00-710-040-A-02 | Operational Test of the FADEC on the Ground (with Engine non Motoring) |
| TASK 78-30-00-081-041-A | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-A | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-A | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-A | Closing of the Thrust Reverser Doors |
CJ12L HarnessSubtask 73-21-50-860-074-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).
Subtask 73-21-50-010-071-A ** ON A/C NOT FOR ALL (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).
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
(2) Make sure that the left thrust reverser door is open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL
Subtask 73-21-50-040-055-A ** ON A/C NOT FOR ALL 4. Procedure(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
(2) Make sure that the left thrust reverser door is open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL
Subtask 73-21-50-420-093-A ** ON A/C NOT FOR ALL
A. Installation of the CJ12L Harness
(1) Remove the caps from the harness connectors, and set the harness in position.
(2) Install O-ring (18) on the receptacle.
(3) Install the 6 o'clock receptacle on the 6 o'clock junction box, and attach with the related nut (19) (view W).
(4) TORQUE the nut (19) to between 158 and 143 lbf.in (1.79 and 1.62 m.daN )
.
(5) Safety the nut to the CJ11L connector nut withCP8001 lockwire 0.032 in. (0.8 mm) dia. CP8002 lockwire 0.032 in. (0.8 mm) dia
PRE SB 75-021
(a) Connect the electrical harness CJ12L to the Variable Stator Vane (VSV) position sensor, the Variable Bleed Valve (VBV) position sensor outer connector channel B (marked CH A), the Burner Staging Valve (BSV) pressure switch (channel B). Connect the J12 harness receptacle in the 6 o'clock junction box as follows:
POST SB 75-021
(b) Connect the electrical harness CJ12L to the VSV position sensor, the VBV position sensor outer connector (channel B), the BSV pressure switch (channel B). Connect the J12 harness receptacle in the 6 o'clock junction box, as follows:
END OF SB 75-021
(c) Engage the connector in the related receptacle, and turn the knurled coupling ring by hand until full engagement.
(d) Tighten the coupling ring with PLIERS - JAWED, SOFT.
(e) Make sure that the connector is fully engaged and does not move.
(f) If necessary, do the above steps again.
(7) Attach the harness junction box to the bracket installed on the fan frame center hub at the 8:30 o'clock location with bolt (21) lightly lubricated with graphite grease (Material No.CP2101) . Tighten the bolt (detail B) by hand.
(8) Install the loop clamps on the electrical harness, and attach the clamps with bolts, the threads lightly lubricated with graphite grease (Material No.CP2101) . Tighten the bolts on the items which follow:
(a) The clamp installed on the Variable Bleed Valve (VBV) fuel gear motor (detail A), with CJ11L loop clamp.
PRE SB 72-007
(b) The bracket at the 8 o'clock location on the fan frame center hub (detail C).
POST SB 72-007
(c) The boss at the 8 o'clock location on the fan frame center hub (detail C).
END OF SB 72-007
(d) The support installed on the left side of the 6 o'clock junction box (detail D), with CJ11L loop clamp.
(e) The bracket installed on the rear face of the 6 o'clock junction box (detail E), with the CJ11L loop clamp.
(9) Make sure that the harness is not stressed. TORQUE the bolts which attach the clamps and the junction box to between 50 and 45 lbf.in (0.57 and 0.51 m.daN ).
Subtask 73-21-50-942-070-A ** ON A/C NOT FOR ALL (1) Remove the caps from the harness connectors, and set the harness in position.
(2) Install O-ring (18) on the receptacle.
(3) Install the 6 o'clock receptacle on the 6 o'clock junction box, and attach with the related nut (19) (view W).
(4) TORQUE the nut (19) to between 158 and 143 lbf.in (1.79 and 1.62 m.daN )
. (5) Safety the nut to the CJ11L connector nut with
CAUTION:
CAREFULLY ALIGN THE CONNECTOR KEY WITH THE RECEPTACLE KEYWAY BEFORE YOU CONNECT THEM TO PREVENT DAMAGE TO THE CONNECTORS.
CAUTION:
DISTRIBUTE THE SLACK ALL ALONG THE CABLE. DO NOT LET THE CABLE SHEATH TOUCH THE ADJACENT COMPONENTS. DO NOT TWIST THE SHEATH BY MORE THAN 180 DEGREES.
(6) Connect the electrical connectors: PRE SB 75-021
(a) Connect the electrical harness CJ12L to the Variable Stator Vane (VSV) position sensor, the Variable Bleed Valve (VBV) position sensor outer connector channel B (marked CH A), the Burner Staging Valve (BSV) pressure switch (channel B). Connect the J12 harness receptacle in the 6 o'clock junction box as follows:
POST SB 75-021
(b) Connect the electrical harness CJ12L to the VSV position sensor, the VBV position sensor outer connector (channel B), the BSV pressure switch (channel B). Connect the J12 harness receptacle in the 6 o'clock junction box, as follows:
END OF SB 75-021
(c) Engage the connector in the related receptacle, and turn the knurled coupling ring by hand until full engagement.
(d) Tighten the coupling ring with PLIERS - JAWED, SOFT.
(e) Make sure that the connector is fully engaged and does not move.
(f) If necessary, do the above steps again.
(7) Attach the harness junction box to the bracket installed on the fan frame center hub at the 8:30 o'clock location with bolt (21) lightly lubricated with graphite grease (Material No.CP2101) . Tighten the bolt (detail B) by hand.
(8) Install the loop clamps on the electrical harness, and attach the clamps with bolts, the threads lightly lubricated with graphite grease (Material No.CP2101) . Tighten the bolts on the items which follow:
(a) The clamp installed on the Variable Bleed Valve (VBV) fuel gear motor (detail A), with CJ11L loop clamp.
PRE SB 72-007
(b) The bracket at the 8 o'clock location on the fan frame center hub (detail C).
POST SB 72-007
(c) The boss at the 8 o'clock location on the fan frame center hub (detail C).
END OF SB 72-007
(d) The support installed on the left side of the 6 o'clock junction box (detail D), with CJ11L loop clamp.
(e) The bracket installed on the rear face of the 6 o'clock junction box (detail E), with the CJ11L loop clamp.
(9) Make sure that the harness is not stressed. TORQUE the bolts which attach the clamps and the junction box to between 50 and 45 lbf.in (0.57 and 0.51 m.daN )
. B. Remove the WARNING NOTICE(S).
Subtask 73-21-50-861-052-A ** ON A/C NOT FOR ALL Subtask 73-21-50-710-052-A ** ON A/C NOT FOR ALL 5. Close-upSubtask 73-21-50-862-052-A ** ON A/C NOT FOR ALL Subtask 73-21-50-410-052-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 left thrust reverser cowl door (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL
Subtask 73-21-50-440-052-A ** ON A/C NOT FOR ALL Subtask 73-21-50-410-067-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close left thrust reverser cowl door (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL