DOC AIRBUS | AMM A320FInstallation of the Inlet Duct and the Outlet Duct of the Skin Heat Exchanger
TASK 21-26-42-400-804-A
Installation of the Inlet Duct and the Outlet Duct of the Skin Heat Exchanger
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 21-26-42-860-063-A
Subtask 21-26-42-420-062-B
Subtask 21-26-42-410-064-A
[Rev.10 from 2021]
2026.04.02 06:47:59 UTC
Installation of the Inlet Duct and the Outlet Duct of the Skin Heat Exchanger
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
BE VERY CAREFUL WHEN YOU DO WORK ON OR NEAR THE AIR-CONDITIONING DUCTS. THE DUCTS ARE MADE OF THIN MATERIAL AND YOU CAN EASILY BREAK THEM.
CAUTION:
USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE THE AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
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 | SPATULA - NON METALLIC |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.06CMD9) | Silicone Adhesive Sealant-General Purpose One part legacy |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 810 | AVIONICS COMPARTMENT DOORS (LEFT) |
| 820 | AVIONICS COMPT DOOR (RIGHT) |
| 812, 822 |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 6 | O-RING | AIPC 21-26-01-17-020 |
| 4 | SEAL | AIPC 21-26-01-18-120 |
| 13 | SEAL | AIPC 21-26-01-18-127 |
| 3 | SEAL | AIPC 21-26-01-18-140 |
| 1 | SEAL | AIPC 21-26-01-18-160 |
| 6 | O-RING | AIPC 21-26-81-17-050 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 21-26-00-710-001-A | Operational Check of the Avionics Equipment Ventilation-System via MCDU |
| TASK 21-26-00-710-001-A-01 | Operational Check of the Avionics Equipment Ventilation (without the CFDS) |
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 24-42-00-862-001-A | De-energize the Ground Service Network Supplied from the External Power |
| TASK 52-41-00-010-002-A | Open the Avionics Compartment Doors for Access |
| TASK 52-41-00-410-002-A | Close the Avionics Compartment Doors after Access |
Inlet Duct of the Skin Heat ExchangerSubtask 21-26-42-860-063-A
A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
Subtask 21-26-42-865-072-A (1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 21-26-42-010-069-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 6HQ | D06 |
| 49VU | AIR COND/AVNCS VENT/CTL | 5HQ | D05 |
| ** ON A/C NOT FOR ALL | |||
| 123VU | AVNCS VENT/EXTC/FAN | 2HQ | AE02 |
| ** ON A/C ALL | |||
| 123VU | AVNCS VENT/BLOWER/FAN | 1HQ | AD10 |
| ** ON A/C NOT FOR ALL | |||
| 123VU | AVNCS VENT/EXTC/FAN | 2HQ | AC04 |
C. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the applicable access door 812 and/or 822.
(2) To get access to the inlet duct of the skin heat exchanger:
(a) Make sure that access door is open 822 (Ref. AMM TASK 52-41-00-010-002).
(3) To get access to the outlet duct of the skin heat exchanger:
(a) Make sure that access door is open 812 (Ref. AMM TASK 52-41-00-010-002).
4. Procedure(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the applicable access door 812 and/or 822.
(2) To get access to the inlet duct of the skin heat exchanger:
(a) Make sure that access door is open 822 (Ref. AMM TASK 52-41-00-010-002).
(3) To get access to the outlet duct of the skin heat exchanger:
(a) Make sure that access door is open 812 (Ref. AMM TASK 52-41-00-010-002).
Subtask 21-26-42-420-062-B
A. Installation of the Inlet Duct of the Skin Heat Exchanger
(1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Install the seals (13) and (1) as follows:
(a) Use a SPATULA - NON METALLIC and apply a layer of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) to the mating surfaces of the heat exchanger and the ducts. You must wait for 5 minutes before you install the gaskets and the ducts.
(b) Carefully install a new AIPC 21-26-01-18-127 SEAL (13) and the new AIPC 21-26-01-18-160 SEAL (1) on the ducts (12) and (2).
(6) Put the duct (12) in position, and install the washers (11) and the screws (10).
(7) Tighten the screws (10) in the sequence given in the illustration.
(8) Install the flexible sleeve (14) on the duct (12).
(9) Put the duct (2) in position, and install the washers (3) and the screws (4).
(10) Tighten the screws (4) in the sequence given in the illustration.
(11) Put the flexible sleeve (14) in position. Make sure that the flexible sleeve (14) is in the correct position on the ducts (12) and (2).
(12) Install and tighten the clamps (9):
(a) Use the clamps (9) removed during the removal procedure.
(13) Install a new AIPC 21-26-01-17-020 O-RING (6) or AIPC 21-26-81-17-050 O-RING (6) in the groove of the extraction valve (7) of the heat exchanger.
(14) Release the extraction valve (7) of the heat exchanger from the structure.
(15) Install the clamp (5). Tighten it with the value given on the clamp.
(16) Install and tighten the support clamp (8).
(17) Carefully install the insulating blankets around the bottom of the ducts (12) and (2).
Subtask 21-26-42-420-063-B (1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Install the seals (13) and (1) as follows:
(a) Use a SPATULA - NON METALLIC and apply a layer of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) to the mating surfaces of the heat exchanger and the ducts. You must wait for 5 minutes before you install the gaskets and the ducts.
(b) Carefully install a new AIPC 21-26-01-18-127 SEAL (13) and the new AIPC 21-26-01-18-160 SEAL (1) on the ducts (12) and (2).
(6) Put the duct (12) in position, and install the washers (11) and the screws (10).
(7) Tighten the screws (10) in the sequence given in the illustration.
(8) Install the flexible sleeve (14) on the duct (12).
(9) Put the duct (2) in position, and install the washers (3) and the screws (4).
(10) Tighten the screws (4) in the sequence given in the illustration.
(11) Put the flexible sleeve (14) in position. Make sure that the flexible sleeve (14) is in the correct position on the ducts (12) and (2).
(12) Install and tighten the clamps (9):
(a) Use the clamps (9) removed during the removal procedure.
(13) Install a new AIPC 21-26-01-17-020 O-RING (6) or AIPC 21-26-81-17-050 O-RING (6) in the groove of the extraction valve (7) of the heat exchanger.
(14) Release the extraction valve (7) of the heat exchanger from the structure.
(15) Install the clamp (5). Tighten it with the value given on the clamp.
(16) Install and tighten the support clamp (8).
(17) Carefully install the insulating blankets around the bottom of the ducts (12) and (2).
B. Installation of the Outlet Duct of the Skin Heat Exchanger
(1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Install the seals (4) and (3) as follows:
(a) Use a SPATULA - NON METALLIC and apply a layer of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) to the mating surfaces of the heat exchanger and the ducts. You must wait for 5 minutes before you install the gaskets and the ducts.
(b) Carefully install a new AIPC 21-26-01-18-120 SEAL (4) and the new AIPC 21-26-01-18-140 SEAL (3) on the heat exchanger.
(6) Put the duct (7) in position, and install the washers (5) and the screws (6).
(7) Tighten the screws (6) in the sequence given in the illustration.
(8) Install the flexible sleeve (9) on the duct (7).
(9) Put the duct (10) in position.
(10) Install the washers (12) and the screws (11).
(11) Tighten the screws (11) in the sequence given in the illustration.
(12) Put the flexible sleeve (9) in position. Make sure that the flexible sleeve (9) is in the correct position on the ducts (7) and (10).
(13) Install and tighten the clamps (8):
(a) Use the clamps (8) removed during the removal procedure.
(14) Install the flexible sleeve (14) on the duct (10).
(15) Put the duct (2) in position between the flexible sleeve (14) and the duct (1).
(16) Install and tighten the support clamp (15) on the duct (2).
(17) Put the flexible sleeve (14) in position. Make sure that the flexible sleeve (14) is in the correct position on the ducts (10) and (2).
(18) Install and tighten the clamps (13):
(a) Use the clamps (13) removed during the removal procedure.
(19) Put the flexible sleeve (17) on the duct (2) in position. Make sure that the flexible sleeve (17) is in the correct position on the ducts (2) and (1).
(20) Install and tighten the clamps (16).
(a) Use the clamps (16) removed during the removal procedure.
(21) Carefully install the insulating blankets around the bottom of the ducts (7), (10), (2) and (1).
Subtask 21-26-42-865-074-A (1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Install the seals (4) and (3) as follows:
(a) Use a SPATULA - NON METALLIC and apply a layer of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) to the mating surfaces of the heat exchanger and the ducts. You must wait for 5 minutes before you install the gaskets and the ducts.
(b) Carefully install a new AIPC 21-26-01-18-120 SEAL (4) and the new AIPC 21-26-01-18-140 SEAL (3) on the heat exchanger.
(6) Put the duct (7) in position, and install the washers (5) and the screws (6).
(7) Tighten the screws (6) in the sequence given in the illustration.
(8) Install the flexible sleeve (9) on the duct (7).
(9) Put the duct (10) in position.
(10) Install the washers (12) and the screws (11).
(11) Tighten the screws (11) in the sequence given in the illustration.
(12) Put the flexible sleeve (9) in position. Make sure that the flexible sleeve (9) is in the correct position on the ducts (7) and (10).
(13) Install and tighten the clamps (8):
(a) Use the clamps (8) removed during the removal procedure.
(14) Install the flexible sleeve (14) on the duct (10).
(15) Put the duct (2) in position between the flexible sleeve (14) and the duct (1).
(16) Install and tighten the support clamp (15) on the duct (2).
(17) Put the flexible sleeve (14) in position. Make sure that the flexible sleeve (14) is in the correct position on the ducts (10) and (2).
(18) Install and tighten the clamps (13):
(a) Use the clamps (13) removed during the removal procedure.
(19) Put the flexible sleeve (17) on the duct (2) in position. Make sure that the flexible sleeve (17) is in the correct position on the ducts (2) and (1).
(20) Install and tighten the clamps (16).
(a) Use the clamps (16) removed during the removal procedure.
(21) Carefully install the insulating blankets around the bottom of the ducts (7), (10), (2) and (1).
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-26-42-710-051-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 6HQ | D06 |
| 49VU | AIR COND/AVNCS VENT/CTL | 5HQ | D05 |
| ** ON A/C NOT FOR ALL | |||
| 123VU | AVNCS VENT/EXTC/FAN | 2HQ | AE02 |
| ** ON A/C ALL | |||
| 123VU | AVNCS VENT/BLOWER/FAN | 1HQ | AD10 |
| ** ON A/C NOT FOR ALL | |||
| 123VU | AVNCS VENT/EXTC/FAN | 2HQ | AC04 |
D. Operational Test of the Avionics Equipment Ventilation-System
(1) Do the operational test of the avionics equipment ventilation-system (Ref. AMM TASK 21-26-00-710-001).
(2) Make sure that there are no leaks.
5. Close-up(1) Do the operational test of the avionics equipment ventilation-system (Ref. AMM TASK 21-26-00-710-001).
(2) Make sure that there are no leaks.
Subtask 21-26-42-410-064-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) To close access to the inlet duct of the skin heat exchanger:
(a) Close access door 822 (Ref. AMM TASK 52-41-00-410-002).
(3) To close access to the outlet duct of the skin heat exchanger:
(a) Close access door 812 (Ref. AMM TASK 52-41-00-410-002).
(4) Remove the access platform(s).
Subtask 21-26-42-862-063-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) To close access to the inlet duct of the skin heat exchanger:
(a) Close access door 822 (Ref. AMM TASK 52-41-00-410-002).
(3) To close access to the outlet duct of the skin heat exchanger:
(a) Close access door 812 (Ref. AMM TASK 52-41-00-410-002).
(4) Remove the access platform(s).