DOC AIRBUS | AMM A320FInstallation of the Fan Plenum Chamber
TASK 21-52-22-400-001-A
Installation of the Fan Plenum Chamber
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 21-52-22-865-051-A
Subtask 21-52-22-420-051-A ** ON A/C NOT FOR ALL
Subtask 21-52-22-410-052-A
[Rev.10 from 2021]
2026.04.01 05:04:04 UTC
Installation of the Fan Plenum Chamber
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.
NOTE: The procedure is the same for fan plenum chambers 10HM5 and 11HM5.
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 0.12 and 0.10 m.daN (10.62 and 8.85 lbf.in )  | |
| No specific | Torque wrench: range to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [10HM5] (PLENUM CHAMBER) | |
| 191KB | |
| FOR [11HM5] (PLENUM CHAMBER) | |
| 192KB | |
| 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 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 20-28-00-912-803-A | Bonding Surface Preparation |
| TASK 21-52-23-400-001-A | Installation of the Pipe Assembly between the Main Heat Exchanger and the Air Cycle Machine |
| TASK 21-52-24-400-001-A | Installation of the Heat Exchanger Unit (into the Aircraft) |
| TASK 21-52-24-400-001-A-01 | Installation of the Heat Exchanger Unit (Into the Air Conditioning Pack) |
| TASK 21-61-52-400-003-A | Installation of the Ram-Air Outlet |
| 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 |
Fan Plenum Chamber 10HM5 (11HM5)Subtask 21-52-22-865-051-A
A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 21-52-22-860-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 10HM5 (PLENUM CHAMBER) | |||
| 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: 11HM5 (PLENUM CHAMBER) | |||
| 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 |
B. Aircraft Maintenance Configuration
(1) Make sure that the access panel is removed (Ref. AMM TASK 53-35-13-000-002):
(a) FOR [10HM5] (PLENUM CHAMBER)
(b) FOR [11HM5] (PLENUM CHAMBER)
(2) On the overhead panel, on AIR COND panel 30VU:
(a) Make sure that:
(3) On the HP ground connector, make sure that the warning notice is in position to tell persons not to supply ground air.
4. Procedure(1) Make sure that the access panel is removed (Ref. AMM TASK 53-35-13-000-002):
(a) FOR [10HM5] (PLENUM CHAMBER)
(b) FOR [11HM5] (PLENUM CHAMBER)
(2) On the overhead panel, on AIR COND panel 30VU:
(a) Make sure that:
- The APU BLEED pushbutton switch is released (the ON legend is off).
- The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are released (the OFF legends are on).
(3) On the HP ground connector, make sure that the warning notice is in position to tell persons not to supply ground air.
Subtask 21-52-22-420-051-A ** ON A/C NOT FOR ALL
A. Installation of the Fan Plenum Chamber
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Clean the component interfaces and the adjacent area.
(4) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(5) Do an inspection of the lip seal (11):
(6) Put the fan plenum chamber (1) in position on the primary heat exchanger (7) and install the washers (3) and the screws (2).
(7) Connect the bonding strap (8):
(b) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(8) TORQUE the screws (2) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ).
(9) Make sure that the lock-washer and the screw on the clamp (9) have no signs of wear and are in good condition. If not, replace the clamp (9).
(10) Put the sleeve (10) in position on the fan plenum chamber (1) and install the clamp (9).
.
(12) Safety the screw of the clamp (9) with the lock-washer.
(13) Put the bellow (5) in position on the fan plenum chamber (1) and install the clamp (4).
(14) Tighten the clamp (4).
(15) Install the ram air outlet(s) (Ref. AMM TASK 21-61-52-400-003).
Subtask 21-52-22-420-051-C ** ON A/C NOT FOR ALL NOTE: It is not necessary to install the gasket (6) during the installation of the fan plenum chamber (1).
(1) Remove the protective cover from the cooling elements of the primary heat exchanger (7). (2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Clean the component interfaces and the adjacent area.
(4) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(5) Do an inspection of the lip seal (11):
NOTE: This work step is not applicable to fan plenum-chamber part-numbers 1816A0000-01, 749A0000-02 Amdt B, 2056A0000-02 Amdt A, 2056B0000-01 Amdt A, 2056C0000-01 and 2056C0000-02.
(a) Make sure that the lip seal (11) is correctly installed and is in good condition. If not, replace the fan plenum chamber (1). (6) Put the fan plenum chamber (1) in position on the primary heat exchanger (7) and install the washers (3) and the screws (2).
(7) Connect the bonding strap (8):
NOTE: This work step is only applicable to fan plenum-chamber part-numbers 1816A0000-01, 749A0000-02 Amdt B, 2056A0000-02 Amdt A, 2056B0000-01 Amdt A, 2056C0000-01 and 2056C0000-02.
(a) Put the bonding strap (8) in position on the plenum flange and install the washer (3) and the screw (2). (b) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(8) TORQUE the screws (2) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in )
. (9) Make sure that the lock-washer and the screw on the clamp (9) have no signs of wear and are in good condition. If not, replace the clamp (9).
(10) Put the sleeve (10) in position on the fan plenum chamber (1) and install the clamp (9).
NOTE: The screw of the clamp (9) will be at the 5 o'clock position when you look from the rear side of the aircraft.
(11) TORQUE the clamp (9) to between 0.12 and 0.10 m.daN (10.62 and 8.85 lbf.in ) . (12) Safety the screw of the clamp (9) with the lock-washer.
(13) Put the bellow (5) in position on the fan plenum chamber (1) and install the clamp (4).
(14) Tighten the clamp (4).
(15) Install the ram air outlet(s) (Ref. AMM TASK 21-61-52-400-003).
A. Installation of the Fan Plenum Chamber
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the lip seal (6):
(4) Clean the component interfaces and the adjacent area.
(5) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(6) Put the fan plenum chamber (3) in position on the primary heat exchanger (5) and install the washers (2) and the screws (1).
(7) TORQUE the screws (1) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ).
(8) Connect the bonding strap (7):
(b) Tighten the nut (10).
(c) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(9) Install the heat exchanger unit(s) (Ref. AMM TASK 21-52-24-400-001).
(10) Install the ram air outlet(s) (Ref. AMM TASK 21-61-52-400-003).
(11) Install the pipe assembly (Ref. AMM TASK 21-52-23-400-001).
Subtask 21-52-22-865-054-A NOTE: It is not necessary to install the gasket (4) during the installation of the fan plenum chamber (3).
(1) Remove the protective cover from the cooling elements of the primary heat exchanger (5). (2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the lip seal (6):
NOTE: This work step is not applicable to fan plenum-chamber part-numbers 749A0000-02 Amdt B, 2056A0000-02 Amdt A, 2056B0000-01 Amdt A, 2056C0000-01, 2056C0000-02, 1816A0000-01 and 1816B0000-01.
(a) Make sure that the lip seal (6) is correctly installed and is in good condition. If not, replace the fan plenum chamber (3). (4) Clean the component interfaces and the adjacent area.
(5) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(6) Put the fan plenum chamber (3) in position on the primary heat exchanger (5) and install the washers (2) and the screws (1).
(7) TORQUE the screws (1) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in )
. (8) Connect the bonding strap (7):
NOTE: This work step is only applicable to plenum-chamber part number 1816A0000-01.
(a) Put the bonding strap (7) in position and install the screw (8), the washer (9) and the nut (10).(b) Tighten the nut (10).
(c) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(9) Install the heat exchanger unit(s) (Ref. AMM TASK 21-52-24-400-001).
(10) Install the ram air outlet(s) (Ref. AMM TASK 21-61-52-400-003).
(11) Install the pipe assembly (Ref. AMM TASK 21-52-23-400-001).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-52-22-710-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 10HM5 (PLENUM CHAMBER) | |||
| 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 |
C. Test of the Fan Plenum Chamber
(1) Do the pre-conditioning through the HP ground connector or with the APU (Ref. AMM TASK 12-33-21-618-001) (Ref. AMM TASK 12-33-21-618-001).
(2) Do a leak check of the fan plenum-chamber 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) (Ref. AMM TASK 12-33-21-618-001).
5. Close-up(1) Do the pre-conditioning through the HP ground connector or with the APU (Ref. AMM TASK 12-33-21-618-001) (Ref. AMM TASK 12-33-21-618-001).
(2) Do a leak check of the fan plenum-chamber 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) (Ref. AMM TASK 12-33-21-618-001).
Subtask 21-52-22-410-052-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 [10HM5] (PLENUM CHAMBER)
(b) FOR [11HM5] (PLENUM CHAMBER)
Subtask 21-52-22-862-050-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 [10HM5] (PLENUM CHAMBER)
(b) FOR [11HM5] (PLENUM CHAMBER)