DOC AIRBUS | AMM A320FInstallation of the Aft Cargo-Trim Air-Valve
TASK 21-43-51-400-001-A
Installation of the Aft Cargo-Trim Air-Valve
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 21-43-51-865-062-A ** ON A/C NOT FOR ALL
Subtask 21-43-51-420-050-B ** ON A/C NOT FOR ALL
Subtask 21-43-51-410-050-B ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:47:30 UTC
Installation of the Aft Cargo-Trim Air-Valve
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.
FIN: 12HC ** ON A/C NOT FOR ALL
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| No specific | Torque wrench: range to between 0.56 and 0.51 m.daN (49.56 and 45.13 lbf.in )  |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 197BB | |
| 197KB |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 2 | O-RINGS | AIPC 21-43-04-14-070 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 21-43-00-710-003-A | Operational Test of the AFT Cargo Compartment Heating System |
| 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 |
Aft Cargo-Trim Air-ValveSubtask 21-43-51-865-062-A ** ON A/C NOT FOR ALL
A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 21-43-51-860-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/AFT CARGO/VENT/CTL & MONG | 31HN | C07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/AFT CARGO/VENT & HTG/CTL & MONG | 31HN | C07 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/AFT CARGO VENT/FAN | 30HN | S22 |
B. Aircraft Maintenance Configuration
(1) Make sure that:
(a) The ACCESS PLATFORM 2M (6 FT) is in position at the access panel 197BB.
(b) The access panel 197BB is removed (Ref. AMM TASK 53-35-13-000-002).
(c) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(d) 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.
(e) On the HP ground connector the warning notice to tell persons not to supply ground air is in position.
Subtask 21-43-51-860-050-C ** ON A/C NOT FOR ALL (1) Make sure that:
(a) The ACCESS PLATFORM 2M (6 FT) is in position at the access panel 197BB.
(b) The access panel 197BB is removed (Ref. AMM TASK 53-35-13-000-002).
(c) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(d) 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.
(e) On the HP ground connector the warning notice to tell persons not to supply ground air is in position.
B. Aircraft Maintenance Configuration
(1) Make sure that:
(a) The ACCESS PLATFORM 2M (6 FT) is in position at the access panel 197KB.
(b) The access panel 197KB is removed (Ref. AMM TASK 53-35-13-000-002).
(c) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(d) 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.
(e) On the HP ground connector the warning notice to tell persons not to supply ground air is in position.
4. Procedure(1) Make sure that:
(a) The ACCESS PLATFORM 2M (6 FT) is in position at the access panel 197KB.
(b) The access panel 197KB is removed (Ref. AMM TASK 53-35-13-000-002).
(c) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(d) 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.
(e) On the HP ground connector the warning notice to tell persons not to supply ground air is in position.
Subtask 21-43-51-420-050-B ** ON A/C NOT FOR ALL
A. Installation of the Trim Air Valve
(1) Remove the blanking plugs from the disconnected line ends.
(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) Make sure that the O-rings (2) are in a good condition. If necessary replace the AIPC 21-43-04-14-070 O-RINGS (2).
(5) Put the O-rings (2) in position on the trim air valve (9) and on the air duct (1).
(6) Put the trim air valve (9) in position and install the clamps (3).
(a) Make sure that:
.
(8) Remove the lock pin (13) from the manual override lever (10) and install it in the stowage hole (12).
(9) Put the bonding strap (8) in position and install the screw (7), the washers (5) and the nut (4) (Ref. AMM TASK 20-28-00-912-802).
(10) Remove the blanking caps and connect the electrical connector (6).
(11) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-43-51-865-063-A ** ON A/C NOT FOR ALL (1) Remove the blanking plugs from the disconnected line ends.
(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) Make sure that the O-rings (2) are in a good condition. If necessary replace the AIPC 21-43-04-14-070 O-RINGS (2).
(5) Put the O-rings (2) in position on the trim air valve (9) and on the air duct (1).
(6) Put the trim air valve (9) in position and install the clamps (3).
(a) Make sure that:
- The trim air valve (9) is in the correct lateral position.
- The arrow on the trim-air valve body points in the direction of the airflow.
. (8) Remove the lock pin (13) from the manual override lever (10) and install it in the stowage hole (12).
(9) Put the bonding strap (8) in position and install the screw (7), the washers (5) and the nut (4) (Ref. AMM TASK 20-28-00-912-802).
(10) Remove the blanking caps and connect the electrical connector (6).
(11) Make sure that the work area is clean and clear of tools and other items.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-43-51-710-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/AFT CARGO/VENT/CTL & MONG | 31HN | C07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/AFT CARGO/VENT & HTG/CTL & MONG | 31HN | C07 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/AFT CARGO VENT/FAN | 30HN | S22 |
C. Test
(1) Do the operational test of the AFT cargo heating system (Ref. AMM TASK 21-43-00-710-003).
5. Close-up(1) Do the operational test of the AFT cargo heating system (Ref. AMM TASK 21-43-00-710-003).
Subtask 21-43-51-410-050-B ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 197BB (Ref. AMM TASK 53-35-13-400-002).
(3) Remove the access platform.
(4) Remove the WARNING NOTICE(S).
Subtask 21-43-51-410-050-C ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 197BB (Ref. AMM TASK 53-35-13-400-002).
(3) Remove the access platform.
(4) Remove the WARNING NOTICE(S).
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 197KB.
(3) Remove the access platform.
(4) Remove the WARNING NOTICE(S).
Subtask 21-43-51-862-050-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 197KB.
(3) Remove the access platform.
(4) Remove the WARNING NOTICE(S).