DOC AIRBUS | AMM A320FInstallation of the HTRAS/CLP Harnesses - ICU Channel A and Channel B [CFML]
TASK 71-51-43-400-805-A
Installation of the HTRAS/CLP Harnesses - ICU Channel A and Channel B
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 71-51-43-941-081-A
Subtask 71-51-43-440-051-A
[Rev.10 from 2021]
2026.04.02 07:32:16 UTC
Installation of the HTRAS/CLP Harnesses - ICU Channel A and Channel B
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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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 1M(3 FT) |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CPNCL00062) | LUBRICATING OIL TURBINE ENGINE SYNT BASE |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR | |
| 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 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
| TASK 73-25-34-710-805-A | Operational Test of the Engine Interface Unit (with CFDS) |
| TASK 73-29-00-740-804-A | Thrust Reverser Cycling Test (Menu Mode) |
| TASK 78-30-00-040-807-A | Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU) |
| TASK 78-30-00-440-807-A | Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU) |
HTRAS/CLP Harnesses - ICU Channel A and Channel BSubtask 71-51-43-941-081-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
Subtask 71-51-43-010-100-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Make sure that the fan cowl doors are open (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) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 71-51-43-040-053-A (1) Make sure that the fan cowl doors are open (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) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
C. Deactivation of the Thrust Reverser System for Maintenance
4. ProcedureWARNING:
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) Make sure that you did the deactivation of the thrust reverser system for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807). CAUTION:
MAKE SURE THERE IS CLEARANCE BETWEEN THE ELECTRICAL HARNESS AND THE FORWARD FRAME PARTS OR DAMAGE CAN OCCUR.
Subtask 71-51-43-420-082-A A. Installation of the HTRAS/CLP Harnesses - ICU Channel A And Channel B
(1) Install the Channel A harness (3) as follows:
(a) Remove all the COVER - PROTECTION and CAP - PROTECTION on the openings, tubes, hoses and connectors.
(b) Lubricate the threads of the bolts (8), (11), (12), (24), (26), (27) and (30) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(c) Install the P-clamps (7), (10), (13), (23), (25), (28) and (29) on the harness (3).
(d) Use the record made during the removal procedure to set the clamps in the correct location and position.
(e) Put the harness (3) (with the P-clamps attached) in position on the engine.
(f) Connect the electrical connector (41) to the pylon junction box (42) (Ref. AMM TASK 70-70-00-910-804).
(g) Connect the electrical connector (17) to the ICU (16) (Ref. AMM TASK 70-70-00-910-804).
(h) Connect the electrical connector (1) to the fan cowl interface (2) (Ref. AMM TASK 70-70-00-910-804).
(i) Install the bolt (8) that attaches the P-clamp (7) to the support bracket (6).
(j) Install the bolt (11) that attaches the P-clamp (10) to the support bracket (5).
(k) Install the bolt (12) that attaches the P-clamp (13) to the support bracket (4).
(l) Install the bolt (24) that attaches the P-clamp (23) to the support bracket (22).
(m) Install the bolts (26) and (30) that attaches the P-clamps (25) and (29) to the support bracket (19).
(n) Install the bolt (27) that attaches the P-clamp (28) to the support bracket (31).
(o) Adjust the tension in the harness (3) along the length of the harness routing on the engine. Make sure that the harness does not touch adjacent components.
(p) TORQUE the bolts (8), (11), (12), (24), (26), (27) and (30) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN ).
(2) Install the channel B harness (18) as follows:
(a) Remove all the COVER - PROTECTION and CAP - PROTECTION on the openings, tubes, hoses and connectors.
(b) Lubricate the threads of the bolts (21) and (35) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(c) Install the P-clamps (20) and (34) on the harness (18).
(d) Use the record made during the removal procedure to set the clamps in the correct location and position.
(e) Put the harness (18) (with the P-clamps attached) in position on the engine.
(f) Connect the electrical connector (38) to the pylon junction box (42) (Ref. AMM TASK 70-70-00-910-804).
(g) Connect the electrical connector (15) to the Isolation Control Unit (ICU) (16) (Ref. AMM TASK 70-70-00-910-804).
(h) Install the bolt (21) that attaches the P-clamp (20) to the support bracket (22).
(i) Install the bolt (35) that attaches the P-clamp (34) to the support bracket (32).
(j) Adjust the tension in the harness (18) along the length of the harness routing on the engine. Make sure that the harness does not touch adjacent components.
(k) TORQUE the bolts (21) and (35) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN ).
Subtask 71-51-43-710-071-A (1) Install the Channel A harness (3) as follows:
(a) Remove all the COVER - PROTECTION and CAP - PROTECTION on the openings, tubes, hoses and connectors.
(b) Lubricate the threads of the bolts (8), (11), (12), (24), (26), (27) and (30) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(c) Install the P-clamps (7), (10), (13), (23), (25), (28) and (29) on the harness (3).
(d) Use the record made during the removal procedure to set the clamps in the correct location and position.
(e) Put the harness (3) (with the P-clamps attached) in position on the engine.
(f) Connect the electrical connector (41) to the pylon junction box (42) (Ref. AMM TASK 70-70-00-910-804).
(g) Connect the electrical connector (17) to the ICU (16) (Ref. AMM TASK 70-70-00-910-804).
(h) Connect the electrical connector (1) to the fan cowl interface (2) (Ref. AMM TASK 70-70-00-910-804).
(i) Install the bolt (8) that attaches the P-clamp (7) to the support bracket (6).
(j) Install the bolt (11) that attaches the P-clamp (10) to the support bracket (5).
(k) Install the bolt (12) that attaches the P-clamp (13) to the support bracket (4).
(l) Install the bolt (24) that attaches the P-clamp (23) to the support bracket (22).
(m) Install the bolts (26) and (30) that attaches the P-clamps (25) and (29) to the support bracket (19).
(n) Install the bolt (27) that attaches the P-clamp (28) to the support bracket (31).
(o) Adjust the tension in the harness (3) along the length of the harness routing on the engine. Make sure that the harness does not touch adjacent components.
(p) TORQUE the bolts (8), (11), (12), (24), (26), (27) and (30) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )
. (2) Install the channel B harness (18) as follows:
(a) Remove all the COVER - PROTECTION and CAP - PROTECTION on the openings, tubes, hoses and connectors.
(b) Lubricate the threads of the bolts (21) and (35) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(c) Install the P-clamps (20) and (34) on the harness (18).
(d) Use the record made during the removal procedure to set the clamps in the correct location and position.
(e) Put the harness (18) (with the P-clamps attached) in position on the engine.
(f) Connect the electrical connector (38) to the pylon junction box (42) (Ref. AMM TASK 70-70-00-910-804).
(g) Connect the electrical connector (15) to the Isolation Control Unit (ICU) (16) (Ref. AMM TASK 70-70-00-910-804).
(h) Install the bolt (21) that attaches the P-clamp (20) to the support bracket (22).
(i) Install the bolt (35) that attaches the P-clamp (34) to the support bracket (32).
(j) Adjust the tension in the harness (18) along the length of the harness routing on the engine. Make sure that the harness does not touch adjacent components.
(k) TORQUE the bolts (21) and (35) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )
. B. Test(s)
(1) Do the operational test of the engine interface unit (with CFDS) (Ref. AMM TASK 73-25-34-710-805).
(2) Do the thrust reverser cycling test (menu mode) (Ref. AMM TASK 73-29-00-740-804).
5. Close-up(1) Do the operational test of the engine interface unit (with CFDS) (Ref. AMM TASK 73-25-34-710-805).
(2) Do the thrust reverser cycling test (menu mode) (Ref. AMM TASK 73-29-00-740-804).
Subtask 71-51-43-440-051-A
A. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 71-51-43-410-078-A B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).