DOC AIRBUS | AMM A320FInstallation of the Pack Discharge Pressure Sensor
TASK 21-61-14-400-001-A
Installation of the Pack Discharge Pressure Sensor
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 21-61-14-860-050-A ** ON A/C NOT FOR ALL
Subtask 21-61-14-420-050-A ** ON A/C NOT FOR ALL
Subtask 21-61-14-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:11:37 UTC
Installation of the Pack Discharge Pressure Sensor
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.
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 1.05 and 0.95 m.daN (92.92 and 84.07 lbf.in )  |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [14HH] (P1 PACK DISCH PRESS SENSOR) | |
| 191KB | |
| FOR [20HH] (P2 PACK DISCH PRESS SENSOR) | |
| 192FB | |
| 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 21-61-00-710-001-A | Operational Test of the Pack Temperature-Control 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 |
Pack Discharge Pressure SensorSubtask 21-61-14-860-050-A ** ON A/C NOT FOR ALL
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 [14HH] (P1 PACK DISCH PRESS SENSOR)
191KB.
2 FOR [20HH] (P2 PACK DISCH PRESS SENSOR)
192FB.
Subtask 21-61-14-865-051-A ** ON A/C NOT FOR ALL (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 [14HH] (P1 PACK DISCH PRESS SENSOR)
191KB.
2 FOR [20HH] (P2 PACK DISCH PRESS SENSOR)
192FB.
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: 14HH (P1 PACK DISCH PRESS SENSOR) | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| 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 |
| FOR FIN: 20HH (P2 PACK DISCH PRESS SENSOR) | |||
| 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 21-61-14-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the Pack Discharge Pressure Sensor
(1) Clean the component interfaces and the adjacent area.
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Put the clamps (8) in position on the pack discharge pressure sensor (11).
(4) Put the pack discharge pressure sensor (11) in position.
(5) Install the washers (7) and the screws (6).
(6) Put the bonding strap (5) in position and install the screw (4), the washer (3) and the nut (2) (Ref. AMM TASK 20-28-00-912-802).
(7) Remove the blanking caps from the disconnected electrical connectors.
(8) Make sure that all the electrical connections are clean and in the correct condition.
(9) Connect the electrical connector (1).
(10) Remove the blanking plugs from the disconnected line ends and connect the pressure sense lines (9) and (10).
(11) TORQUE the pressure sense line-connectors (9) and (10) to between 1.05 and 0.95 m.daN (92.92 and 84.07 lbf.in ).
(12) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-61-14-865-052-A ** ON A/C NOT FOR ALL (1) Clean the component interfaces and the adjacent area.
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Put the clamps (8) in position on the pack discharge pressure sensor (11).
(4) Put the pack discharge pressure sensor (11) in position.
(5) Install the washers (7) and the screws (6).
(6) Put the bonding strap (5) in position and install the screw (4), the washer (3) and the nut (2) (Ref. AMM TASK 20-28-00-912-802).
(7) Remove the blanking caps from the disconnected electrical connectors.
(8) Make sure that all the electrical connections are clean and in the correct condition.
(9) Connect the electrical connector (1).
(10) Remove the blanking plugs from the disconnected line ends and connect the pressure sense lines (9) and (10).
(11) TORQUE the pressure sense line-connectors (9) and (10) to between 1.05 and 0.95 m.daN (92.92 and 84.07 lbf.in )
. (12) 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 21-61-14-710-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 14HH (P1 PACK DISCH PRESS SENSOR) | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| 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 |
| FOR FIN: 20HH (P2 PACK DISCH PRESS SENSOR) | |||
| 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
(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 pack discharge pressure sensor sense line connections.
(4) Do the operational test of the pack temperature-control system (Ref. AMM TASK 21-61-00-710-001).
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 pack discharge pressure sensor sense line connections.
NOTE: Leaks are not permitted.
(3) After approx. 15 minutes stop the pre-conditioning (Ref. AMM TASK 12-33-21-618-001) (Ref. AMM TASK 12-33-21-618-001). (4) Do the operational test of the pack temperature-control system (Ref. AMM TASK 21-61-00-710-001).
Subtask 21-61-14-410-050-A ** 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) Close the access panel (Ref. AMM TASK 53-35-13-400-002),
(a) FOR [14HH] (P1 PACK DISCH PRESS SENSOR)
191KB.
(b) FOR [20HH] (P2 PACK DISCH PRESS SENSOR)
192FB.
Subtask 21-61-14-862-050-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access panel (Ref. AMM TASK 53-35-13-400-002),
(a) FOR [14HH] (P1 PACK DISCH PRESS SENSOR)
191KB.
(b) FOR [20HH] (P2 PACK DISCH PRESS SENSOR)
192FB.