DOC AIRBUS | AMM A320FInstallation of the Cabin Recirculation Fans
TASK 21-21-51-400-001-A
Installation of the Cabin Recirculation Fans
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 21-21-51-860-050-A
Subtask 21-21-51-420-050-A
Subtask 21-21-51-410-050-A
[Rev.10 from 2021]
2026.04.02 06:47:30 UTC
Installation of the Cabin Recirculation Fans
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 the cabin recirculation fans 15HG and 14HG.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 21-21-00-710-001-A | Operational Test of the Cabin Recirculation Fans |
| 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 25-54-12-000-001-A | Removal of the Forward Cargo-Compartment Partition |
| TASK 25-54-12-400-001-A | Installation of the Forward Cargo-Compartment Partition |
| TASK 52-30-00-860-001-A | Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| FOR [14HG] (RECIRC FAN 2) | |
| TASK 06-41-53-00 | FUSELAGE-DESCRIPTION AND OPERATION |
| FOR [15HG] (RECIRC FAN 1) | |
| TASK 06-41-53-00 | FUSELAGE-DESCRIPTION AND OPERATION |
Cabin Recirculation Fan 15HG (14HG)Subtask 21-21-51-860-050-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) On the panel 30VU:
1 The APU BLEED pushbutton switch is in the off position (the ON legend is off).
2 The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legends are on).
3 The warning notice to tell persons not to operate these pushbutton switches is in position.
(c) On the HP and the LP ground connector the warning notice to tell persons not to supply the ground air is in position.
(d) The FWD cargo-compartment door 865 is open (Ref. AMM TASK 52-30-00-860-001).
(e) The ACCESS PLATFORM 2M (6 FT) is in position at the FWD cargo-compartment door 865.
(f) The access panels at partition FR34 are removed (Ref. AMM TASK 25-54-12-000-001).
(g) FOR [15HG] (RECIRC FAN 1)
(h) FOR [14HG] (RECIRC FAN 2)
Subtask 21-21-51-865-051-A (1) Make sure that:
(a) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(b) On the panel 30VU:
1 The APU BLEED pushbutton switch is in the off position (the ON legend is off).
2 The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legends are on).
3 The warning notice to tell persons not to operate these pushbutton switches is in position.
(c) On the HP and the LP ground connector the warning notice to tell persons not to supply the ground air is in position.
(d) The FWD cargo-compartment door 865 is open (Ref. AMM TASK 52-30-00-860-001).
(e) The ACCESS PLATFORM 2M (6 FT) is in position at the FWD cargo-compartment door 865.
(f) The access panels at partition FR34 are removed (Ref. AMM TASK 25-54-12-000-001).
(g) FOR [15HG] (RECIRC FAN 1)
(h) FOR [14HG] (RECIRC FAN 2)
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| FOR FIN: 15HG (RECIRC FAN 1) | |||
| 122VU | AIR COND/RECIRC FAN/L/CTL | 2HG | X20 |
| 122VU | AIR COND/RECIRC FAN/L/SPLY | 1HG | X18 |
| FOR FIN: 14HG (RECIRC FAN 2) | |||
| 122VU | AIR COND/RECIRC FAN/R/CTL | 11HG | W20 |
| 122VU | AIR COND/RECIRC FAN/R/SPLY | 3HG | W18 |
Subtask 21-21-51-420-050-A
A. Installation of the Cabin Recirculation Fan
(1) Remove the blanking plugs from the cabin recirculation fan (15), the sleeve (1) and from the check valve (7). .
(3) Clean the component interfaces and the adjacent area.
(4) Make sure that the parts retained from the removed component are clean and in the correct condition.
(5) Put the recirculation fan lugs (16) in position and install the washers (4), the bolts (3), the washers (5) and the nuts (6).
(6) TORQUE the nuts (6) to between 1.32 and 1.08 m.daN (116.81 and 95.58 lbf.in )
.
(7) Put the clamp (13) in position.
(a) TORQUE the clamp (13) to between 1.120 and 0.916 m.daN (99.12 and 81.06 lbf.in ).
(8) Put the clamp (2) and the sleeve (1) in position on the cabin recirculation fan (15).
(10) Put the bonding strap (10) in position and install the washer (9), the bolt (8), the washer (11) and the nut (12) (Ref. AMM TASK 20-28-00-912-802).
(11) Remove the blanking plugs from the disconnected electrical connectors.
(12) Make sure that all the electrical connections are clean and in the correct condition.
(13) Connect the electrical connector (14).
(14) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-21-51-710-050-A (1) Remove the blanking plugs from the cabin recirculation fan (15), the sleeve (1) and from the check valve (7). .
NOTE: Make sure that the check valve (7) is installed and that it is in the correct position.
The center line of the hinge must be in a vertical position.
(2) Make sure that the sleeve (1) is clean and free from obstructions. The center line of the hinge must be in a vertical position.
(3) Clean the component interfaces and the adjacent area.
(4) Make sure that the parts retained from the removed component are clean and in the correct condition.
(5) Put the recirculation fan lugs (16) in position and install the washers (4), the bolts (3), the washers (5) and the nuts (6).
(6) TORQUE the nuts (6) to between 1.32 and 1.08 m.daN (116.81 and 95.58 lbf.in )
. (7) Put the clamp (13) in position.
(a) TORQUE the clamp (13) to between 1.120 and 0.916 m.daN (99.12 and 81.06 lbf.in )
. (8) Put the clamp (2) and the sleeve (1) in position on the cabin recirculation fan (15).
NOTE: The end of the sleeve (1) must be within the coloured markings painted on the cabin recirculation fan (15).
(9) Tighten the clamp (2). (10) Put the bonding strap (10) in position and install the washer (9), the bolt (8), the washer (11) and the nut (12) (Ref. AMM TASK 20-28-00-912-802).
(11) Remove the blanking plugs from the disconnected electrical connectors.
(12) Make sure that all the electrical connections are clean and in the correct condition.
(13) Connect the electrical connector (14).
(14) Make sure that the work area is clean and clear of tools and other items.
B. Do the operational test of the cabin recirculation fans 14HG (15HG). (Ref. AMM TASK 21-21-00-710-001)
5. Close-upSubtask 21-21-51-410-050-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 at partition FR34 (Ref. AMM TASK 25-54-12-400-001).
(a) FOR [15HG] (RECIRC FAN 1)
(b) FOR [14HG] (RECIRC FAN 2)
(3) Remove the access platform(s).
(4) Close the FWD cargo-compartment door 865 (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the WARNING NOTICE(S).
Subtask 21-21-51-865-052-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel at partition FR34 (Ref. AMM TASK 25-54-12-400-001).
(a) FOR [15HG] (RECIRC FAN 1)
(b) FOR [14HG] (RECIRC FAN 2)
(3) Remove the access platform(s).
(4) Close the FWD cargo-compartment door 865 (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the WARNING NOTICE(S).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-21-51-862-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| FOR FIN: 15HG (RECIRC FAN 1) | |||
| 122VU | AIR COND/RECIRC FAN/L/CTL | 2HG | X20 |
| 122VU | AIR COND/RECIRC FAN/L/SPLY | 1HG | X18 |
| FOR FIN: 14HG (RECIRC FAN 2) | |||
| 122VU | AIR COND/RECIRC FAN/R/CTL | 11HG | W20 |
| 122VU | AIR COND/RECIRC FAN/R/SPLY | 3HG | W18 |