DOC AIRBUS | AMM A320FInstallation of the Environmental Control System (ECS) Harness [CFMI]
TASK 71-52-43-400-004-A
Installation of the Environmental Control System (ECS) 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 71-52-43-860-069-A ** ON A/C NOT FOR ALL
Subtask 71-52-43-420-062-A ** ON A/C NOT FOR ALL
Subtask 71-52-43-869-082-A ** ON A/C NOT FOR ALL Subtask 71-52-43-862-059-A ** ON A/C NOT FOR ALL Subtask 71-52-43-410-068-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:23:34 UTC
Installation of the Environmental Control System (ECS) Harness
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 | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2208) | fiberglass adhesive tape |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| 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 31-60-00-860-001-A | EIS Start Procedure |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
| 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 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 |
Environmental Control System Harness AssemblySubtask 71-52-43-860-069-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).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
Subtask 71-52-43-010-079-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).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
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 71-52-43-040-069-A ** ON A/C NOT FOR ALL Subtask 71-52-43-865-078-A ** ON A/C NOT FOR ALL (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
D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/2/FIRE DET/LOOP B | 8WD2 | A07 |
| 49VU | ENGINE/1/FIRE DET/LOOP A | 7WD1 | A06 |
| 49VU | ENGINE/2/FADEC A/AND EIU 2 | 2KS2 | A05 |
| 49VU | ENGINE/1/FADEC A/AND EIU 1 | 2KS1 | A04 |
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| 49VU | ANTI ICE/PROBES/AOA/1 | 4DA1 | D04 |
| 49VU | ANTI ICE/PROBES/PHC/1 | 2DA1 | D03 |
| 49VU | ANTI ICE/PROBES/PITOT/1 | 3DA1 | D02 |
| 49VU | COM/CVR/SPLY | 2RK | E14 |
| 49VU | COM/CVR/CTL | 4RK | E13 |
| 49VU | NAV PROBES/ADIRU 1/AND AOA 1/26VAC | 5FP1 | F07 |
| 49VU | NAV PROBES/ADIRU1/115VAC | 4FP1 | F06 |
| 105VU | ADIRS/ADIRU1/28VDC | 6FP1 | C02 |
| 121VU | RCDR/DFDR | 7TU | K16 |
| 121VU | ENGINE/ENG2/OIL/PRESS | 2EN2 | N42 |
| 121VU | ENGINE/ENG2/OIL/QTY | 1EN2 | N41 |
| 121VU | ENGINE/ENG1/OIL/PRESS | 2EN1 | N40 |
| 121VU | ENGINE/ENG1/OIL/QTY | 1EN1 | N39 |
| 121VU | ADIRS/ADIRU/2/26VAC AND AOA | 5FP2 | N08 |
| 121VU | ADIRS/ADIRU/3/26VAC AND AOA | 5FP3 | N07 |
| 121VU | ADIRS/ADIRU/2/115VAC | 4FP2 | N06 |
| 121VU | ADIRS/ADIRU/3/115VAC | 4FP3 | N05 |
| 121VU | ADIRS/ADIRU/2/28VDC | 6FP2 | N04 |
| 121VU | ADIRS/ADIRU/3/28VDC | 6FP3 | N03 |
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| 121VU | ENGINE/IGN/ENG2/SYS A BAT | 2JH2 | P40 |
| 121VU | ENGINE/IGN/ENG1/SYS A BAT | 2JH1 | P39 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B | 2WE1 | Q44 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A | 1WE1 | Q43 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B | 2WE2 | Q42 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A | 1WE2 | Q41 |
| 121VU | ENGINE/ENG2/FADEC B | 4KS2 | Q40 |
| 121VU | ENGINE/ENG2/FIRE DET/LOOP A | 7WD2 | Q39 |
| 121VU | ENGINE/ENG1/FIRE DET/LOOP B | 8WD1 | Q38 |
| 121VU | ENGINE/ENG1/FADEC B/AND EIU 1 | 4KS1 | R41 |
| 122VU | ELEC/GCU/2 | 2XU2 | T27 |
| 122VU | ELEC/GCU/1 | 2XU1 | T26 |
| 122VU | ANTI ICE/WINDOWS/R | 4DG2 | W14 |
| 122VU | ANTI ICE/WINDOWS/L | 4DG1 | X14 |
| 122VU | ANTI ICE/PROBES/PHC/3 | 2DA3 | Y16 |
| 122VU | ANTI ICE/PROBES/2/TAT | 1DA2 | Y15 |
| 122VU | ANTI ICE/PROBES/2/PITOT | 3DA2 | Y14 |
| 122VU | ANTI ICE/PROBES/2/AOA | 4DA2 | Y13 |
| 122VU | ANTI ICE/PROBES/PHC/2 | 2DA2 | Y12 |
| 122VU | ANTI ICE/PROBES/2/STATIC | 5DA2 | Y11 |
| 122VU | ANTI ICE/PROBES/3/PITOT | 3DA3 | Z16 |
| 122VU | ANTI ICE/PROBES/3/AOA | 4DA3 | Z15 |
| 122VU | ANTI ICE/PROBES/3/STATIC | 5DA3 | Z14 |
| 122VU | ANTI ICE/PROBES/1/STATIC | 5DA1 | Z13 |
| 122VU | ANTI ICE/PROBES/1/TAT | 1DA1 | Z12 |
Subtask 71-52-43-420-062-A ** ON A/C NOT FOR ALL
A. Installation of the Environmental Control System (ECS) Harness
(2) Put the harness in position on the engine.
(3) Connect the electrical connector 450VC-A to the core junction box.
(4) Remove the bolts (5) and put the harness into the two clamps (10) on the pylon.
(5) Remove the screw (15) and washer (20) and open the clamp (25). Put the harness into the clamp (25) attached to the bracket at station 233. Install the screw (15) and washer (20).
(7) Put the clamp (40) on the harness. Attach the clamp (40) to the bracket at station 221 with the screw (55), washer (20), lug (60) and spacer (65). (Ref. Detail C).
(9) On the branch of the harness that goes to the HPR Valve 4000HA, put the clamps (35) on the harness, two locations. Attach the clamps (35) to the other clamps (35) with the screws (15) , washers (20) and nuts (30).
(10) Put the clamp (35) on the harness. Attach the clamp (35) to the other clamp (40) with the screw (15), washer (20) and nut (30).
(11) Put the clamp (35) on the harness. Attach the clamp (35) and the other clamp (35) to the bracket at station 221 with the screw (15), washer (20) and nut (30).
(12) Put the clamp (40) on the harness. Attach the clamp (40) to the bracket on the aft side of station 215 with the screw (45), washer (20) and nut (30).
(14) Connect the electrical connector 4000HA-A to the High Pressure Regulator (HPR) Valve (4000HA).
(15) TORQUE the screws (15) and (55) and the nuts (30) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ).
(16) Remove the nut (30) and washer (20) from the ground stud GD9964DC.
(a) Use a Textile-Lint free Cotton - (Material No.14SBA1) wet with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the surfaces.
(b) Use a clean lint-free cloth to dry the surface before the solvent becomes a gas.
(18) Put the two ground wires on the ground stud GD9964DC. Attach the wires with the nut (30) and washer (20).
(19) TORQUE the nut (30) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ).
Subtask 71-52-43-760-056-A ** ON A/C NOT FOR ALL NOTE: When using fiberglass clamps on the engine core harnesses, do as follows: Wrap fiberglass adhesive tape (Material No.CP2208) around the harness(es) to make sure that the clamps do not move when they are installed. Wrap only the locations where the clamps are being installed.
NOTE: Before you tighten the clamps, adjust the wire harness to get the maximum clearance between the harness and the other structures on the engine. Make sure that the harness will not touch other structures.
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.(2) Put the harness in position on the engine.
(3) Connect the electrical connector 450VC-A to the core junction box.
(4) Remove the bolts (5) and put the harness into the two clamps (10) on the pylon.
(5) Remove the screw (15) and washer (20) and open the clamp (25). Put the harness into the clamp (25) attached to the bracket at station 233. Install the screw (15) and washer (20).
NOTE: Make sure that the Installation Reference Markers are aligned under the clamp. The Installation Reference Markers are fiberglass tape on the harnesses.
(6) Put the clamp (35) on the branch of the harness, that goes to the BPR valve 4001HA. Attach the clamp (35) with the screw (45), washer (20) and nut (30). (Ref. Detail C). (7) Put the clamp (40) on the harness. Attach the clamp (40) to the bracket at station 221 with the screw (55), washer (20), lug (60) and spacer (65). (Ref. Detail C).
NOTE: Make sure that the Installation Reference Markers are aligned under the clamp. The Installation Reference Markers are fiberglass tape on the harnesses.
(8) Connect the electrical connector 4001HA-A to the Bleed Pressure Regulator (BPR) Valve (4001HA). (9) On the branch of the harness that goes to the HPR Valve 4000HA, put the clamps (35) on the harness, two locations. Attach the clamps (35) to the other clamps (35) with the screws (15) , washers (20) and nuts (30).
(10) Put the clamp (35) on the harness. Attach the clamp (35) to the other clamp (40) with the screw (15), washer (20) and nut (30).
(11) Put the clamp (35) on the harness. Attach the clamp (35) and the other clamp (35) to the bracket at station 221 with the screw (15), washer (20) and nut (30).
(12) Put the clamp (40) on the harness. Attach the clamp (40) to the bracket on the aft side of station 215 with the screw (45), washer (20) and nut (30).
NOTE: Make sure that the Installation Reference Markers are aligned under the clamp. The Installation Reference Markers are fiberglass tape on the harnesses.
(13) Put the clamp (50) on the harness. Attach the clamp (50) to the bracket on the forward side of station 215 with the screw (45), washer (20) and nut (30). (14) Connect the electrical connector 4000HA-A to the High Pressure Regulator (HPR) Valve (4000HA).
(15) TORQUE the screws (15) and (55) and the nuts (30) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
. (16) Remove the nut (30) and washer (20) from the ground stud GD9964DC.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(17) Clean the mating surfaces of the ground wires, the nut and washer and the ground stud. (a) Use a Textile-Lint free Cotton - (Material No.14SBA1) wet with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the surfaces.
(b) Use a clean lint-free cloth to dry the surface before the solvent becomes a gas.
(18) Put the two ground wires on the ground stud GD9964DC. Attach the wires with the nut (30) and washer (20).
(19) TORQUE the nut (30) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
. B. Do an electrical bond resistance check.
(1) Put one lead of the ohmmeter on the ground wire near the ground stud GD9964DC.
(2) Put the other lead of the ohmmeter on the top surface of the bracket.
(3) The resistance measured between the ohmmeter leads must not be more than 0.001 ohm.
(4) If the resistance is more than 0.001 ohm, remove the applicable hardware and clean the mating surfaces. Do this procedure again until the resistance is less than 0.001 ohm.
Subtask 71-52-43-865-079-A ** ON A/C NOT FOR ALL (1) Put one lead of the ohmmeter on the ground wire near the ground stud GD9964DC.
(2) Put the other lead of the ohmmeter on the top surface of the bracket.
(3) The resistance measured between the ohmmeter leads must not be more than 0.001 ohm.
(4) If the resistance is more than 0.001 ohm, remove the applicable hardware and clean the mating surfaces. Do this procedure again until the resistance is less than 0.001 ohm.
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 71-52-43-861-059-A ** ON A/C NOT FOR ALL Subtask 71-52-43-869-080-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/2/FIRE DET/LOOP B | 8WD2 | A07 |
| 49VU | ENGINE/1/FIRE DET/LOOP A | 7WD1 | A06 |
| 49VU | ENGINE/2/FADEC A/AND EIU 2 | 2KS2 | A05 |
| 49VU | ENGINE/1/FADEC A/AND EIU 1 | 2KS1 | A04 |
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| 49VU | ANTI ICE/PROBES/AOA/1 | 4DA1 | D04 |
| 49VU | ANTI ICE/PROBES/PHC/1 | 2DA1 | D03 |
| 49VU | ANTI ICE/PROBES/PITOT/1 | 3DA1 | D02 |
| 49VU | COM/CVR/SPLY | 2RK | E14 |
| 49VU | COM/CVR/CTL | 4RK | E13 |
| 49VU | NAV PROBES/ADIRU 1/AND AOA 1/26VAC | 5FP1 | F07 |
| 49VU | NAV PROBES/ADIRU1/115VAC | 4FP1 | F06 |
| 105VU | ADIRS/ADIRU1/28VDC | 6FP1 | C02 |
| 121VU | RCDR/DFDR | 7TU | K16 |
| 121VU | ENGINE/ENG2/OIL/PRESS | 2EN2 | N42 |
| 121VU | ENGINE/ENG2/OIL/QTY | 1EN2 | N41 |
| 121VU | ENGINE/ENG1/OIL/PRESS | 2EN1 | N40 |
| 121VU | ENGINE/ENG1/OIL/QTY | 1EN1 | N39 |
| 121VU | ADIRS/ADIRU/2/26VAC AND AOA | 5FP2 | N08 |
| 121VU | ADIRS/ADIRU/3/26VAC AND AOA | 5FP3 | N07 |
| 121VU | ADIRS/ADIRU/2/115VAC | 4FP2 | N06 |
| 121VU | ADIRS/ADIRU/3/115VAC | 4FP3 | N05 |
| 121VU | ADIRS/ADIRU/2/28VDC | 6FP2 | N04 |
| 121VU | ADIRS/ADIRU/3/28VDC | 6FP3 | N03 |
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| 121VU | ENGINE/IGN/ENG2/SYS A BAT | 2JH2 | P40 |
| 121VU | ENGINE/IGN/ENG1/SYS A BAT | 2JH1 | P39 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B | 2WE1 | Q44 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A | 1WE1 | Q43 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A | 1WE2 | Q41 |
| 121VU | ENGINE/ENG2/FADEC B | 4KS2 | Q40 |
| 121VU | ENGINE/ENG2/FIRE DET/LOOP A | 7WD2 | Q39 |
| 121VU | ENGINE/ENG1/FIRE DET/LOOP B | 8WD1 | Q38 |
| 121VU | ENGINE/ENG1/FADEC B/AND EIU 1 | 4KS1 | R41 |
| 122VU | ELEC/GCU/2 | 2XU2 | T27 |
| 122VU | ELEC/GCU/1 | 2XU1 | T26 |
| 122VU | ANTI ICE/WINDOWS/R | 4DG2 | W14 |
| 122VU | ANTI ICE/WINDOWS/L | 4DG1 | X14 |
| 122VU | ANTI ICE/PROBES/PHC/3 | 2DA3 | Y16 |
| 122VU | ANTI ICE/PROBES/2/TAT | 1DA2 | Y15 |
| 122VU | ANTI ICE/PROBES/2/PITOT | 3DA2 | Y14 |
| 122VU | ANTI ICE/PROBES/2/AOA | 4DA2 | Y13 |
| 122VU | ANTI ICE/PROBES/PHC/2 | 2DA2 | Y12 |
| 122VU | ANTI ICE/PROBES/2/STATIC | 5DA2 | Y11 |
| 122VU | ANTI ICE/PROBES/3/PITOT | 3DA3 | Z16 |
| 122VU | ANTI ICE/PROBES/3/AOA | 4DA3 | Z15 |
| 122VU | ANTI ICE/PROBES/3/STATIC | 5DA3 | Z14 |
| 122VU | ANTI ICE/PROBES/1/STATIC | 5DA1 | Z13 |
| 122VU | ANTI ICE/PROBES/1/TAT | 1DA1 | Z12 |
E. Do the EIS start procedure (for the upper and lower display units of the ECAM system) (Ref. AMM TASK 31-60-00-860-001).
Subtask 71-52-43-869-081-A ** ON A/C NOT FOR ALL F. Aircraft Maintenance Configuration
(1) On the BLEED page of the lower display unit of the ECAM system; make sure that:
5. Close-up(1) On the BLEED page of the lower display unit of the ECAM system; make sure that:
- the BLEED PRESSURE REGULATOR VALVE is closed
- the HIGH PRESSURE REGULATOR VALVE is closed.
Subtask 71-52-43-869-082-A ** ON A/C NOT FOR ALL Subtask 71-52-43-862-059-A ** ON A/C NOT FOR ALL Subtask 71-52-43-410-068-A ** ON A/C NOT FOR ALL
C. 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 71-52-43-440-059-A ** ON A/C NOT FOR ALL Subtask 71-52-43-410-069-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