DOC AIRBUS | AMM A320FRemoval of the HJ8B Engine Wiring Harness [CFML]
TASK 73-21-60-000-814-A
Removal of the HJ8B Engine Wiring Harness
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 73-21-60-941-079-A
Subtask 73-21-60-020-065-A
[Rev.10 from 2021]
2026.04.01 13:07:22 UTC
Removal of the HJ8B Engine Wiring Harness
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | CAP - PROTECTION |
| No specific | AR | COVER - PROTECTION |
| No specific | 1 | PLIERS - JAWED, SOFT |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2267) | RTV 106 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-70-00-910-804-A | Electrical Standard Practices |
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 72-24-01-000-801-A | Removal of Segment Shrouds 1 thru 5 |
| TASK 78-30-00-040-809-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-36-00-010-806-A | Opening of the Thrust Reverser Cowl Doors |
HJ8B Engine Wiring HarnessSubtask 73-21-60-941-079-A
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 73-21-60-010-082-A (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch
- The ENG/MASTER 1(2) control switch.
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 73-21-60-040-054-A (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 73-21-60-010-088-A WARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-809). D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
4. Procedure(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 73-21-60-020-065-A
A. Removal of the HJ8B Engine Wiring Harness (4159KS)
(1) Remove the segment shroud 1 (4) (Ref. AMM TASK 72-24-01-000-801).
(2) Remove the segment shroud 2 (3) (Ref. AMM TASK 72-24-01-000-801).
(b) Disconnect the HJ8B engine wiring harness (2) connector from the nacelle anti-ice pressure sensor 2 (4002DN) (14) (at the 6 o'clock position).
(c) Disconnect the HJ8B engine wiring harness (2) connector from the fan overheat temperature sensor 2 channel B receptacle (4250KS2) (13) (at the 6 o'clock position).
(d) Disconnect the HJ8B engine wiring harness (2) connector from the fan overheat temperature sensor 1 channel A receptacle (4250KS1) (15) (at the 12 o'clock position).
(e) Disconnect the HJ8B engine wiring harness (2) connector from the Fuel Return Valve (FRV) channel B receptacle (4018KS) (16) (at the 12 o'clock position).
(f) Disconnect the HJ8B engine wiring harness (2) connector from the HJ8A engine wiring harness receptacle (4158KS) (17) (at the 3 o'clock position).
(g) Disconnect the HJ8B engine wiring harness (2) connector from the T48 harness (right) (4168KS2) (18) (at the 2:30 o'clock position).
(h) Disconnect the HJ8B engine wiring harness (2) connector from the No. 1 bearing accelerometer (4188KS) (19) (at the 2:30 o'clock position).
(i) Disconnect the HJ8B engine wiring harness (2) connector from the T3 sensor channel B (4084KS) (22) (at the 2 o'clock position).
PRE SB 72-0122
(4) Remove the nut (7) and the bolt (9) from the clamp (8) that attaches to the HJ8B engine wiring harness (2).
END OF PRE SB 72-0122
POST SB 72-0122
(5) Remove the nut (7) and the bolt (9) from the clamp (8) that attaches the HJ8B engine wiring harness (2).
END OF POST SB 72-0122
(6) Removal of the bolts from the clamps that attach to the HJ8B engine wiring harness (2):
(a) Remove the bolt (10) from the clamp (6).
(b) Remove the bolt (11) from the clamp (12).
PRE SB 72-0251
(c) Remove the bolt (21) from the clamp (20).
END OF PRE SB 72-0251
POST SB 72-0251 and PRE SB 72-0444
(d) Remove the bolt (21) from the clamp (20).
END OF POST SB 72-0251 and END OF PRE SB 72-0444
POST SB 72-0444
(e) Remove the bolt (21) from the clamp (20).
END OF POST SB 72-0444
PRE SB 72-0444
(f) Remove the bolt (23) from the clamp (24).
(8) Removal of the bracket assemblies:
(a) Removal of the bracket assembly (28):
1 Remove the five nuts (30) and the five bolts (27) that attach the bracket assembly (28) on the fireproof block (31) and bracket (29).
2 Remove the bracket assembly (28).
(b) Removal of the bracket assembly (25):
1 Remove the four nuts (32) and the four bolts (26) that attach the bracket assembly (25) on the fireproof block (31) and bracket (29).
2 Remove the bracket assembly (25).
(9) Remove and discard the fireproof block (31).
(10) Remove the HJ8B engine wiring harness (2) from the clips (1) along its routing.
(11) Carefully remove the HJ8B engine wiring harness (2) from the engine.
(12) Install the COVER - PROTECTION and the CAP - PROTECTION on all the open ports, open tubes, open hoses and disconnected connectors.
(1) Remove the segment shroud 1 (4) (Ref. AMM TASK 72-24-01-000-801).
(2) Remove the segment shroud 2 (3) (Ref. AMM TASK 72-24-01-000-801).
CAUTION:
MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
CAUTION:
USE PLIERS THAT HAVE TEFLON JAWS TO TIGHTEN OR LOOSEN THE ELECTRICAL CONNECTORS. DO NOT USE PLIERS THAT HAVE METAL JAWS. METAL JAWS CAN CAUSE DAMAGE TO THE ELECTRICAL CONNECTORS.
(3) Disconnection of the HJ8B engine wiring harness (4159KS) (2) (Ref. AMM TASK 70-70-00-910-804):NOTE: If necessary, use PLIERS - JAWED, SOFT to disconnect the electrical connectors.
(a) Disconnect the HJ8B engine wiring harness (2) connector from the Electronic Engine Control (EEC) channel B J8 receptacle (4601KS2) (5) (at the 3 o'clock position). (b) Disconnect the HJ8B engine wiring harness (2) connector from the nacelle anti-ice pressure sensor 2 (4002DN) (14) (at the 6 o'clock position).
(c) Disconnect the HJ8B engine wiring harness (2) connector from the fan overheat temperature sensor 2 channel B receptacle (4250KS2) (13) (at the 6 o'clock position).
(d) Disconnect the HJ8B engine wiring harness (2) connector from the fan overheat temperature sensor 1 channel A receptacle (4250KS1) (15) (at the 12 o'clock position).
(e) Disconnect the HJ8B engine wiring harness (2) connector from the Fuel Return Valve (FRV) channel B receptacle (4018KS) (16) (at the 12 o'clock position).
(f) Disconnect the HJ8B engine wiring harness (2) connector from the HJ8A engine wiring harness receptacle (4158KS) (17) (at the 3 o'clock position).
(g) Disconnect the HJ8B engine wiring harness (2) connector from the T48 harness (right) (4168KS2) (18) (at the 2:30 o'clock position).
(h) Disconnect the HJ8B engine wiring harness (2) connector from the No. 1 bearing accelerometer (4188KS) (19) (at the 2:30 o'clock position).
(i) Disconnect the HJ8B engine wiring harness (2) connector from the T3 sensor channel B (4084KS) (22) (at the 2 o'clock position).
PRE SB 72-0122
(4) Remove the nut (7) and the bolt (9) from the clamp (8) that attaches to the HJ8B engine wiring harness (2).
END OF PRE SB 72-0122
POST SB 72-0122
(5) Remove the nut (7) and the bolt (9) from the clamp (8) that attaches the HJ8B engine wiring harness (2).
END OF POST SB 72-0122
(6) Removal of the bolts from the clamps that attach to the HJ8B engine wiring harness (2):
(a) Remove the bolt (10) from the clamp (6).
(b) Remove the bolt (11) from the clamp (12).
PRE SB 72-0251
(c) Remove the bolt (21) from the clamp (20).
END OF PRE SB 72-0251
POST SB 72-0251 and PRE SB 72-0444
(d) Remove the bolt (21) from the clamp (20).
END OF POST SB 72-0251 and END OF PRE SB 72-0444
POST SB 72-0444
(e) Remove the bolt (21) from the clamp (20).
END OF POST SB 72-0444
PRE SB 72-0444
(f) Remove the bolt (23) from the clamp (24).
NOTE: The cushioned clamp (24) and the bolt (23) are deleted through SB 72-0444 and replaced by spring clip on the support bracket.
END OF PRE SB 72-0444
(7) Cut and remove the RTV 106 (Material No.CP2267) around the engine harnesses. END OF PRE SB 72-0444
(8) Removal of the bracket assemblies:
(a) Removal of the bracket assembly (28):
1 Remove the five nuts (30) and the five bolts (27) that attach the bracket assembly (28) on the fireproof block (31) and bracket (29).
2 Remove the bracket assembly (28).
(b) Removal of the bracket assembly (25):
1 Remove the four nuts (32) and the four bolts (26) that attach the bracket assembly (25) on the fireproof block (31) and bracket (29).
2 Remove the bracket assembly (25).
(9) Remove and discard the fireproof block (31).
(10) Remove the HJ8B engine wiring harness (2) from the clips (1) along its routing.
(11) Carefully remove the HJ8B engine wiring harness (2) from the engine.
(12) Install the COVER - PROTECTION and the CAP - PROTECTION on all the open ports, open tubes, open hoses and disconnected connectors.