DOC AIRBUS | AMM A320FInstallation of the System Pressure Switch
TASK 29-32-12-400-003-A
Installation of the System Pressure Switch
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 29-32-12-860-058-A
Subtask 29-32-12-420-054-B
Subtask 29-32-12-860-053-A
[Rev.10 from 2021]
2026.04.01 08:04:26 UTC
Installation of the System Pressure Switch
WARNING:
MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
FIN: 3151GN
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | CONTAINER - HYDRAULIC FLUID RESISTANT |
| No specific | 2 | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 3.470 and 3.186 m.daN (25.59 and 23.50 lbf.ft )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 196BB |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 3 | O-RING | AIPC 29-32-03-03-070 |
| 3 | O-RING | AIPC 29-32-83-03-100 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-10-00-863-002-A | Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-864-002-A | Depressurize the Yellow Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-14-00-614-002-A | Pressurization of the Hydraulic Reservoirs through the Ground Connector |
| TASK 29-14-00-614-002-A-01 | Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU) |
| TASK 29-23-00-860-001-A | Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 29-23-00-860-002-A | Connection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 29-32-00-710-003-A | Operational Test of the System Pressure Switch , Pressure Transducer and the associated Indicating System of the Yellow Hydraulic System |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
System Pressure Switch of the Green and Yellow Hydraulic SystemsSubtask 29-32-12-860-058-A
A. Aircraft Maintenance Configuration
(2) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the reservoir of the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Yellow hydraulic system:
(6) Make sure that the access panel 196BB is open.
(7) Make sure that the isolation coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001).
(8) Make sure that the CONTAINER - HYDRAULIC FLUID RESISTANT is in position below the location of the system pressure switch.
Subtask 29-32-12-865-058-A WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002). (2) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the reservoir of the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Yellow hydraulic system:
- In the cockpit on the hydraulic section 40VU of the overhead panel,
- On the ground service panel of the Yellow hydraulic system.
(6) Make sure that the access panel 196BB is open.
(7) Make sure that the isolation coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001).
(8) Make sure that the CONTAINER - HYDRAULIC FLUID RESISTANT is in position below the location of the system pressure switch.
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 | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| ** ON A/C ALL | |||
| 105VU | FLIGHT CONTROLS/ELAC2/STBY SPLY | 16CE2 | A02 |
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/SEC2/SPLY | 21CE2 | Q18 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
Subtask 29-32-12-420-054-B
A. Installation of the Pressure Switch
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking plugs from the ports of the manifold.
(4) Lubricate the new AIPC 29-32-03-03-070 O-RING (3) or AIPC 29-32-83-03-100 O-RING (3) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(5) Put the new O-ring (3) in position on the system pressure switch (2).
(6) Install the system pressure switch (2) in the manifold (4) and TORQUE to between 3.470 and 3.186 m.daN (25.59 and 23.50 lbf.ft ).
14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(8) Install the clamp (9), the bonding jumper (7), the screw (8), the washer (6) and the nut (5) at the system pressure switch (2) (Ref. AMM TASK 20-28-00-912-802).
(9) Remove the blanking cap from the electrical connector (1).
(10) Make sure that all the electrical connections are clean and in the correct condition.
(11) Connect the electrical connector (1) to the system pressure switch (2).
Subtask 29-32-12-865-055-A (1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking plugs from the ports of the manifold.
(4) Lubricate the new AIPC 29-32-03-03-070 O-RING (3) or AIPC 29-32-83-03-100 O-RING (3) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(5) Put the new O-ring (3) in position on the system pressure switch (2).
(6) Install the system pressure switch (2) in the manifold (4) and TORQUE to between 3.470 and 3.186 m.daN (25.59 and 23.50 lbf.ft )
. WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(7) Safety the system pressure switch (2) with (8) Install the clamp (9), the bonding jumper (7), the screw (8), the washer (6) and the nut (5) at the system pressure switch (2) (Ref. AMM TASK 20-28-00-912-802).
(9) Remove the blanking cap from the electrical connector (1).
(10) Make sure that all the electrical connections are clean and in the correct condition.
(11) Connect the electrical connector (1) to the system pressure switch (2).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 29-32-12-790-052-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| ** ON A/C ALL | |||
| 105VU | FLIGHT CONTROLS/ELAC2/STBY SPLY | 16CE2 | A02 |
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/SEC2/SPLY | 21CE2 | Q18 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
C. Leak Test of the Hydraulic Connections
(1) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-863-002).
(3) Examine the connection of the system pressure switch and make sure that there are no leaks.
(4) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
Subtask 29-32-12-710-052-A (1) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-863-002).
(3) Examine the connection of the system pressure switch and make sure that there are no leaks.
(4) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
D. Do the operational test of the hydraulic pressure indicating system (Ref. AMM TASK 29-32-00-710-003).
5. Close-upSubtask 29-32-12-860-053-A
A. Put the aircraft back to the serviceable condition.
(1) Remove the container.
(2) Connect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-002).
(3) Remove the WARNING NOTICE(S).
Subtask 29-32-12-410-052-A (1) Remove the container.
(2) Connect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-002).
(3) Remove the WARNING NOTICE(S).
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the main door of the main gear (Ref. AMM TASK 32-12-00-410-001).
(3) Close the access panel 196BB.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the main door of the main gear (Ref. AMM TASK 32-12-00-410-001).
(3) Close the access panel 196BB.