DOC AIRBUS | AMM A320FRemoval of the HJ7 Harness for SAC Engines [CFMB]
TASK 73-21-50-000-040-A
Removal of the HJ7 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. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 73-21-50-941-080-A ** ON A/C NOT FOR ALL
Subtask 73-21-50-020-068-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:05:44 UTC
Removal of the HJ7 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 | CAP - BLANKING |
| No specific | AR | PLIERS - CONNECTOR, JAW, SOFT |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 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 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 |
HJ7 HarnessSubtask 73-21-50-941-080-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 73-21-50-010-100-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 73-21-50-040-111-A ** ON A/C NOT FOR ALL Subtask 73-21-50-010-126-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 73-21-50-020-068-A ** ON A/C NOT FOR ALL
A. Removal of the HJ7 Harness
(1) Disconnect the HJ7 harness from the ECU (J7 receptacle), the HMU (CH. A), the N2 speed sensor (CH. A) and the fuel return valve (CH. A). Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove parts which attach the HJ7 harness as follows:
(4) Remove the HJ7 harness from the engine.
(1) Disconnect the HJ7 harness from the ECU (J7 receptacle), the HMU (CH. A), the N2 speed sensor (CH. A) and the fuel return valve (CH. A). Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove parts which attach the HJ7 harness as follows:
| REMOVE | FROM | NOTE |
|---|---|---|
| Bolt (10) Clamp (30) | Bracket (20) | At the 9:30 o'clock position on flange D (Detail F) |
| Bolt (40) Clamp (50) | Bracket (60) | At the 9:30 o'clock position on flange C (Detail G) |
| Bolt (70) Clamp (90) | Bracket (80) | At the 9 o'clock position on flange C (Detail H) |
| HJ7 Harness | Clips (120) and (130) on brackets (100) and (110) | At the 8:30 o'clock position on flange C (Detail J) |
| Bolt (140) Clamp (160) | Bracket (150) | At the 8 o'clock position on flange C (Detail K) |
| HJ7 Harness | Clip (180) on bracket (170) | At the 8 o'clock position on flange C (Detail L) |
| Bolt (210) Clamp (200) | Bracket (190) | At the 7:30 o'clock position on flange C (Detail M) |
| Bolt (230) Clamp (220) | Bracket (240) | At the 7 o'clock position on flange B (Detail N) |
| Bolt (270) Clamp (260) | Bracket (250) (three locations) | Between the 6 o'clock and the 7 o'clock positions on flange B (Detail P) |
| Bolt (280) Clamp (290) | Bracket (300) (two locations) | At the 6 o'clock position on flange B (Detail Q) |
| HJ7 Harness | Clip (310) on bracket (320) | At the 6 o'clock position on flange C (Detail R) |
| HJ7 Harness | Clip (330) on bracket (340) | At the 5:30 o'clock position on flange E (Detail S) |
| Nut (360) Bolt (370) Plates (350) | Bracket assembly (390) | At the 5 o'clock position between flanges E and F (Detail T) |
| HJ7 Harness | Flexible clamp (380) | (Detail T) |
| Bolt (410) Clamp (400) | Bracket (420) | At the 5:30 o'clock position on flange E (Detail U) |
| HJ7 Harness | Clip (430) on bracket (440) | At the 5:30 o'clock position on flange F (Detail V) |
| Bolt (460) Clamp (450) | Bracket (470) | At the 6 o'clock position on the aft side of the AGB (Detail W) |
| HJ7 Harness | Clip (480) on bracket (490) | At the 6 o'clock position on the flange F (Detail X) |
| Bolt (500) Clamp (510) | Bracket (520) | At the 6 o'clock position on the TGB left-hand side (Detail Y) |