DOC AIRBUS | AMM A320FInstallation of the Pipe Assembly between the Anti-Ice Valve (if installed), the Bypass Valve and the Air Cycle Machine
TASK 21-52-23-400-002-A
Installation of the Pipe Assembly between the Anti-Ice Valve (if installed), the Bypass Valve and the Air Cycle Machine
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 21-52-23-860-052-A
Subtask 21-52-23-210-053-A
Subtask 21-52-23-410-057-A
[Rev.10 from 2021]
2026.04.02 06:48:35 UTC
Installation of the Pipe Assembly between the Anti-Ice Valve (if installed), the Bypass Valve and the Air Cycle Machine
WARNING:
MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE.
HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
NOTE: The procedure for the removal of the pipe assembly is the same for the left and right side.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | Torque wrench: range to between 0.55 and 0.50 m.daN (48.67 and 44.25 lbf.in )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03QBB9) | Dry lubricant-General Assembly Molybdenum Disulfide - |
| (Material No.03QBD1) | Dry lubricant-General Assembly Graphite - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [10HM] (PACK 1-AIR CONDITIONING) | |
| 191KB | |
| FOR [11HM] (PACK 2-AIR CONDITIONING) | |
| 192KB | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 2 | PACKING | AIPC 21-52-41-27-020 |
| 4 | SEAL | AIPC 21-52-41-27-035 |
| 6 | SEAL | AIPC 21-52-41-27-035 |
| 3 | PACKING | AIPC 21-52-41-27-055 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-33-21-618-001-A-01 | Pre-conditioning through the HP Ground Connection |
| TASK 12-33-21-618-001-A-02 | Pre-conditioning with the APU |
| TASK 20-26-00-910-002-A | Installation of Expansion Joints |
| TASK 21-52-00-200-002-A | Detailed Visual Inspection of the Pipe Assemblies between the Heat Exchanger Unit, the Bypass Valve, the Anti-Ice Valve (if installed) and the Air Cycle Machine |
| 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 53-35-13-000-002-A | Removal of the Quick-Release Access Panels from the Belly Fairing Structure |
| TASK 53-35-13-400-002-A | Installation of the Quick-Release Access Panels on the Belly Fairing Structure |
Pipe Assembly.Subtask 21-52-23-860-052-A
A. Aircraft Maintenance Configuration
(1) Make sure that:
(a) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(b) The access panel is removed (Ref. AMM TASK 53-35-13-000-002),
1 FOR [10HM] (PACK 1-AIR CONDITIONING)
2 FOR [11HM] (PACK 2-AIR CONDITIONING)
(c) On the overhead panel, on AIR COND panel 30VU:
1 The APU BLEED pushbutton switch is released (the ON legend is off).
2 The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are released (the OFF legends are on).
3 The warning notice is in position to tell persons not to operate these pushbutton switches.
(d) On the HP ground connector, the warning notice is in position to tell persons not to supply ground air.
Subtask 21-52-23-865-055-A (1) Make sure that:
(a) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(b) The access panel is removed (Ref. AMM TASK 53-35-13-000-002),
1 FOR [10HM] (PACK 1-AIR CONDITIONING)
2 FOR [11HM] (PACK 2-AIR CONDITIONING)
(c) On the overhead panel, on AIR COND panel 30VU:
1 The APU BLEED pushbutton switch is released (the ON legend is off).
2 The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are released (the OFF legends are on).
3 The warning notice is in position to tell persons not to operate these pushbutton switches.
(d) On the HP ground connector, the warning notice is in position to tell persons not to supply ground air.
B. 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 | |||
| FOR FIN: 10HM (PACK 1AIR CONDITIONING) | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/115VAC | 1HH | X22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/28VDC | 3HH | X21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/28VDC | 4HH | Y19 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/115VAC | 2HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 11HM (PACK 2AIR CONDITIONING) | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/115VAC | 21HH | W22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/28VDC | 23HH | W21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/28VDC | 24HH | Y21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/115VAC | 22HH | Y20 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/115VAC | 53HH | W22 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/28VDC | 55HH | W21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
Subtask 21-52-23-210-053-A
A. Inspection of the Pipe Assembly
(1) Do the visual inspection of the pipe assembly (Ref. AMM TASK 21-52-00-200-002).
Subtask 21-52-23-560-051-A ** ON A/C NOT FOR ALL (1) Do the visual inspection of the pipe assembly (Ref. AMM TASK 21-52-00-200-002).
B. Preparation of the Replacement Component (if necessary)
(1) Disconnect the clamp (5) from the removed pipe assembly (8).
(2) Remove the blanking plate (4).
(3) Remove and discard the packing (3).
(4) Put a new AIPC 21-52-41-27-055 PACKING (3) in position on the replacement pipe assembly (8).
(5) Put the blanking plate (4) in position on the pipe assembly (8).
(6) Install the clamp (5).
(7) TORQUE the clamp (5) to between 0.55 and 0.50 m.daN (48.67 and 44.25 lbf.in ).
Subtask 21-52-23-420-050-C ** ON A/C NOT FOR ALL (1) Disconnect the clamp (5) from the removed pipe assembly (8).
(2) Remove the blanking plate (4).
(3) Remove and discard the packing (3).
(4) Put a new AIPC 21-52-41-27-055 PACKING (3) in position on the replacement pipe assembly (8).
(5) Put the blanking plate (4) in position on the pipe assembly (8).
(6) Install the clamp (5).
(7) TORQUE the clamp (5) to between 0.55 and 0.50 m.daN (48.67 and 44.25 lbf.in )
. C. Installation of the Pipe Assembly
(1) Do the visual inspection of the pipe assembly (Ref. AMM TASK 21-52-00-200-002).
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Apply lubricant:
2 Apply the material 03QBD1 dry.
(4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Clean the component interfaces and the adjacent area.
(6) Put the new AIPC 21-52-41-27-035 SEAL (4) in position in the pipe assembly (8) (Ref. AMM TASK 20-26-00-910-002).
(7) Put the packing (2) in position on the air-cycle machine (1) and the packing (3) in position on the pipe assembly (8).
(8) Carefully put the pipe assembly (8) in position on the by-pass valve (7), the air-cycle machine (1) and the anti-ice valve (6).
(9) Install the clamps (5) and (9).
(10) Make sure that the clamps (5) and (9) are in the correct position.
(11) TORQUE the clamps (5) and (9) to between 0.55 and 0.50 m.daN (48.67 and 44.25 lbf.in ).
(12) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-52-23-420-050-D ** ON A/C NOT FOR ALL (1) Do the visual inspection of the pipe assembly (Ref. AMM TASK 21-52-00-200-002).
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Apply lubricant:
CAUTION:
USE ONLY THE SPECIFIED LUBRICANT TO LUBRICATE THE O-RINGS AND THE PACKINGS. OTHER LUBRICANTS CAN CAUSE SMOKE OR A SMELL IN THE CABIN WHEN THEY BECOME HOT.
(a) Apply a small quantity of: - Dry lubricant-General Assembly Molybdenum Disulfide - (Material No.03QBB9)
or - Dry lubricant-General Assembly Graphite - (Material No.03QBD1)
to the new AIPC 21-52-41-27-020 PACKING (2) and the new AIPC 21-52-41-27-055 PACKING (3).
2 Apply the material 03QBD1 dry.
(4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Clean the component interfaces and the adjacent area.
(6) Put the new AIPC 21-52-41-27-035 SEAL (4) in position in the pipe assembly (8) (Ref. AMM TASK 20-26-00-910-002).
(7) Put the packing (2) in position on the air-cycle machine (1) and the packing (3) in position on the pipe assembly (8).
(8) Carefully put the pipe assembly (8) in position on the by-pass valve (7), the air-cycle machine (1) and the anti-ice valve (6).
(9) Install the clamps (5) and (9).
(10) Make sure that the clamps (5) and (9) are in the correct position.
(11) TORQUE the clamps (5) and (9) to between 0.55 and 0.50 m.daN (48.67 and 44.25 lbf.in )
. (12) Make sure that the work area is clean and clear of tools and other items.
C. Installation of the Pipe Assembly
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Apply lubricant:
2 Apply the material 03QBD1 dry.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Clean the component interfaces and the adjacent area.
(5) Put the new AIPC 21-52-41-27-035 SEAL (6) in position in the pipe assembly (8) (Ref. AMM TASK 20-26-00-910-002).
(6) Put the packing (2) in position on the air-cycle machine (1).
(7) Carefully put the pipe assembly (8) in position on the by-pass valve (7) and the air-cycle machine (1).
(8) Install the clamp (9).
(9) Make sure that the clamp (9) is in the correct position.
(10) TORQUE the clamp (9) to between 0.55 and 0.50 m.daN (48.67 and 44.25 lbf.in ).
(11) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-52-23-865-066-A (1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Apply lubricant:
CAUTION:
USE ONLY THE SPECIFIED LUBRICANT TO LUBRICATE THE O-RINGS AND THE PACKINGS. OTHER LUBRICANTS CAN CAUSE SMOKE OR A SMELL IN THE CABIN WHEN THEY BECOME HOT.
(a) Apply a small quantity of: - Dry lubricant-General Assembly Molybdenum Disulfide - (Material No.03QBB9)
or - Dry lubricant-General Assembly Graphite - (Material No.03QBD1)
to the new AIPC 21-52-41-27-020 PACKING (2).
2 Apply the material 03QBD1 dry.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Clean the component interfaces and the adjacent area.
(5) Put the new AIPC 21-52-41-27-035 SEAL (6) in position in the pipe assembly (8) (Ref. AMM TASK 20-26-00-910-002).
(6) Put the packing (2) in position on the air-cycle machine (1).
(7) Carefully put the pipe assembly (8) in position on the by-pass valve (7) and the air-cycle machine (1).
(8) Install the clamp (9).
(9) Make sure that the clamp (9) is in the correct position.
(10) TORQUE the clamp (9) to between 0.55 and 0.50 m.daN (48.67 and 44.25 lbf.in )
. (11) Make sure that the work area is clean and clear of tools and other items.
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-52-23-710-051-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 10HM (PACK 1AIR CONDITIONING) | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/115VAC | 1HH | X22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/28VDC | 3HH | X21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/28VDC | 4HH | Y19 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/115VAC | 2HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 11HM (PACK 2AIR CONDITIONING) | |||
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/115VAC | 21HH | W22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/28VDC | 23HH | W21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/28VDC | 24HH | Y21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/115VAC | 22HH | Y20 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/115VAC | 53HH | W22 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/28VDC | 55HH | W21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
E. Test
(1) Do the pre-conditioning through the HP ground connector (Ref. AMM TASK 12-33-21-618-001) or with the APU (Ref. AMM TASK 12-33-21-618-001).
(2) Do a leak check of the pipe assembly connections.
Make sure that there are no leaks.
(3) After approximately 15 minutes stop the pre-conditioning (Ref. AMM TASK 12-33-21-618-001) or (Ref. AMM TASK 12-33-21-618-001).
5. Close-up(1) Do the pre-conditioning through the HP ground connector (Ref. AMM TASK 12-33-21-618-001) or with the APU (Ref. AMM TASK 12-33-21-618-001).
(2) Do a leak check of the pipe assembly connections.
Make sure that there are no leaks.
(3) After approximately 15 minutes stop the pre-conditioning (Ref. AMM TASK 12-33-21-618-001) or (Ref. AMM TASK 12-33-21-618-001).
Subtask 21-52-23-410-057-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel (Ref. AMM TASK 53-35-13-400-002):
(a) FOR [10HM] (PACK 1-AIR CONDITIONING)
(b) FOR [11HM] (PACK 2-AIR CONDITIONING)
(3) Remove the WARNING NOTICE(S).
Subtask 21-52-23-862-051-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel (Ref. AMM TASK 53-35-13-400-002):
(a) FOR [10HM] (PACK 1-AIR CONDITIONING)
(b) FOR [11HM] (PACK 2-AIR CONDITIONING)
(3) Remove the WARNING NOTICE(S).