DOC AIRBUS | AMM A320FRemoval of the Cabin-Pressure Detection Pressure-Switch
TASK 52-73-12-000-001-A
Removal of the Cabin-Pressure Detection Pressure-Switch
1. Reason for the Job
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 52-73-12-860-050-A
Subtask 52-73-12-020-050-A
[Rev.10 from 2021]
2026.04.02 06:28:36 UTC
Removal of the Cabin-Pressure Detection Pressure-Switch
1. Reason for the Job
NOTE: Two persons are necessary to do this procedure.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | AR | CAP - BLANKING |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 122 | AVIONICS COMPARTMENT |
| 811 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
Cabin Pressure Detection Pressure Switch - (14WN)Subtask 52-73-12-860-050-A
A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
Subtask 52-73-12-865-050-A (1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 52-73-12-010-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | EIS/SLIDES/ARM AND WARN/FLT | 15WN | P11 |
| 121VU | EIS/SLIDES/ARM AND WARN/GND | 13WN | P10 |
C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at zone 122.
(2) Open avionics compartment access-door 811.
4. Procedure(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at zone 122.
(2) Open avionics compartment access-door 811.
Subtask 52-73-12-020-050-A
A. Removal of the Cabin-Pressure Detection Pressure-Switch
(2) Put the CAP - BLANKING on the electrical connector (4).
(3) Remove the calibrated plug (1).
(4) Put the PLUG - BLANKING in the hole of the calibrated plug (1).
(6) Remove the restrictor (7) together with the O-ring (6).
(7) Remove the O-ring (6) from the restrictor (7) and discard the O-ring (6).
(8) Put the PLUG - BLANKING in the connection of the line (8).
(9) Remove the bolts (3) and the washers (2).
(10) Remove the cabin-pressure detection pressure-switch (5).
CAUTION:
USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE RESTRICTOR WHEN YOU DISCONNECT/CONNECT THE STATIC LINE. IF YOU DO NOT USE A SECOND WRENCH, YOU CAN CAUSE DAMAGE TO THE PRESSURE SWITCH AND/OR THE STATIC LINE.
(1) Disconnect the electrical connector (4).(2) Put the CAP - BLANKING on the electrical connector (4).
(3) Remove the calibrated plug (1).
(4) Put the PLUG - BLANKING in the hole of the calibrated plug (1).
CAUTION:
USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS CAUTION, YOU CAN TWIST OR CAUSE DAMAGE TO THE TUBES OR HOSES.
(5) Disconnect the line (8).(6) Remove the restrictor (7) together with the O-ring (6).
(7) Remove the O-ring (6) from the restrictor (7) and discard the O-ring (6).
(8) Put the PLUG - BLANKING in the connection of the line (8).
(9) Remove the bolts (3) and the washers (2).
(10) Remove the cabin-pressure detection pressure-switch (5).