DOC AIRBUS | AMM A320FInstallation of the HJ8 Harness for SAC Engines [CFMB]
TASK 73-21-50-400-041-A
Installation of the HJ8 Harness for SAC Engines
1. Reason for the Job
This task is applicable for SAC Engines.
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 73-21-50-860-064-A ** ON A/C NOT FOR ALL
Subtask 73-21-50-420-069-A ** ON A/C NOT FOR ALL
Subtask 73-21-50-410-088-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:58:56 UTC
Installation of the HJ8 Harness for SAC Engines
1. Reason for the Job
This task is applicable for SAC Engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | PLIERS - CONNECTOR, JAW, SOFT |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2101) | graphite grease |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| 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 73-29-00-710-040-B | Operational Test of the FADEC on the Ground (with Engine Motoring) |
| TASK 73-29-00-710-040-B-02 | Operational Test of the FADEC on the Ground (with Engine Non motoring) |
| TASK 78-30-00-081-041-B | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-B | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-B | Closing of the Thrust Reverser Doors |
HJ8 HarnessSubtask 73-21-50-860-064-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 73-21-50-010-129-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 thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 73-21-50-040-087-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 thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 73-21-50-420-069-A ** ON A/C NOT FOR ALL
A. Installation of the HJ8 Harness
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Install the HJ8 harness in position on the fan frame.
(4) Connect the HJ8 harness to the ECU (J8 receptacle), the HMU (CH. B), the N2 speed sensor (CH. B), and the fuel return valve (CH. B). Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(5) Make sure that the connectors are fully engaged and do not move.
(6) Lubricate the threads of bolts with graphite grease (Material No.CP2101) before installation.
(7) Install parts to attach the HJ8 harness as follows:
(8) Make sure that the HJ8 harness is not stressed.
(9) TORQUE nuts (360) and all the bolts to between 55 and 45 lbf.in (0.62 and 0.51 m.daN ).
Subtask 73-21-50-710-069-A ** ON A/C NOT FOR ALL 5. Close-upCAUTION:
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.
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Install the HJ8 harness in position on the fan frame.
(4) Connect the HJ8 harness to the ECU (J8 receptacle), the HMU (CH. B), the N2 speed sensor (CH. B), and the fuel return valve (CH. B). Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(5) Make sure that the connectors are fully engaged and do not move.
(6) Lubricate the threads of bolts with graphite grease (Material No.CP2101) before installation.
(7) Install parts to attach the HJ8 harness as follows:
| INSTALL | ON | NOTE |
|---|---|---|
| Clamp (20) Bolt (10) | Bracket (30) | At the 9:30 o'clock position on flange D (Detail F) |
| Clamp (60) Bolt (50) | Bracket (40) | At the 9:30 o'clock position on flange D (Detail G) |
| Clamp (70) Bolt (80) | Bracket (90) | At the 9 o'clock position on flange C (Detail J) |
| HJ8 Harness | Clips (100) and (110) on brackets (120) and (130) | At the 8:30 o'clock position on flange C (Detail H) |
| Clamp (140) Bolt (150) | Bracket (160) | At the 8 o'clock position on flange C (Detail K) |
| HJ8 Harness | Clip (180) on bracket (170) | At the 8 o'clock position on flange C (Detail L) |
| Clamp (200) Bolt (210) | Bracket (190) | At the 7:30 o'clock position on flange C (Detail M) |
| Clamp (230) Bolt (240) | Bracket (220) | At the 7 o'clock position on flange B (Detail N) |
| Clamps (260) Bolts (270) | Brackets (250) (three locations) | Between the 6 o'clock and the 7:30 o'clock positions on flange B (Detail P) |
| Clamps (290) Bolts (280) | Brackets (300) (two locations) | At the 6 o'clock position, flanges B and C (Detail Q) |
| HJ8 Harness | Clip (310) on bracket (320) | At the 6 o'clock position on flange C (Detail R) |
| HJ8 Harness | Clip (330) on bracket (340) | At the 5:30 o'clock position on flange E (Detail S) |
| HJ8 Harness | Flexible clamp (370) | Part of the bracket assembly (360) (Detail T) |
| Plate (380) Bolt (350) Nut (390) | Bracket assembly (360) and bracket (400) | At the 5 o'clock position between flanges E and F (Detail T) |
| Clamp (420) Bolt (410) | Bracket (430) | At the 5:30 o'clock position on flange E (Detail U) |
| HJ8 Harness | Clip (440) on bracket (450) | At the 6 o'clock position on flange E (Detail V) |
| Clamp (460) Bolt (470) | Bracket (450) | At the 6 o'clock position on the TGB left-hand side (Detail X) |
| Clamp (500) Bolt (490) | Bracket (480) | At the 6 o'clock position on the TGB left-hand side (Detail W) |
(9) TORQUE nuts (360) and all the bolts to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )
. Subtask 73-21-50-410-088-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 73-21-50-440-078-A ** ON A/C NOT FOR ALL Subtask 73-21-50-410-106-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 the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR