DOC AIRBUS | AMM A320FInstallation of the Low Level Switch of the Green Hydraulic Reservoir
TASK 29-11-41-400-003-A
Installation of the Low Level Switch of the Green Hydraulic Reservoir
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 29-11-41-860-059-A
Subtask 29-11-41-420-052-A
Subtask 29-11-41-860-060-A
[Rev.10 from 2021]
2026.04.01 00:15:52 UTC
Installation of the Low Level Switch of the Green Hydraulic Reservoir
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.
ZONE: 147
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 3M (10 FT)- ADJUSTABLE |
| No specific | 1 | CONTAINER - HYDRAULIC FLUID RESISTANT |
| No specific | 2 | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 147 | MAIN GEAR WELL AND HYDRAULIC COMPARTMENT |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 7 | O-RING | AIPC 29-11-41-01-020 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| TASK 12-12-29-611-002-A | Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart |
| 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 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 29-10-00-863-001-A | Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| 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 29-23-00-863-001-A | Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump |
| TASK 29-23-00-864-001-A | Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU |
| TASK 29-31-00-710-001-A | Functional Check of Reservoir Low Level Warning |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
| 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 |
Quantity Indicator and Low Level SwitchSubtask 29-11-41-860-059-A
A. Aircraft Maintenance Configuration
(2) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Green hydraulic system:
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(5) Make sure that the main doors of the main gear are open (Ref. AMM TASK 32-12-00-010-001).
(6) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position at the main doors of the main gear.
(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 below the reservoir.
Subtask 29-11-41-865-058-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 WARNING NOTICE(S) are in position to tell persons not to pressurize the Green hydraulic system:
- in the cockpit on the hydraulic section 40VU of the overhead panel,
- on the ground service panel of the Green hydraulic system.
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(5) Make sure that the main doors of the main gear are open (Ref. AMM TASK 32-12-00-010-001).
(6) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position at the main doors of the main gear.
(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 below the reservoir.
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 | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | H12 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | R35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/LOW/LVL/IND | 1832GQ | N32 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
Subtask 29-11-41-420-052-A
A. Installation of the Low Level Switch
(1) Remove the blanking plug from the reservoir (1).
(2) Lubricate the new AIPC 29-11-41-01-020 O-RING (7) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(3) Put the O-ring (7) in position on the low level switch (8).
(4) Put the low level switch (8) in position in the reservoir (1).
(5) Install the bolts (10) and the washers (9).
(6) Remove the blanking caps from the electrical connector (11) and from the receptacle.
(7) Make sure that all the electrical connections are clean and in the correct condition.
(8) Connect the electrical connector (11).
Subtask 29-11-41-865-059-A (1) Remove the blanking plug from the reservoir (1).
(2) Lubricate the new AIPC 29-11-41-01-020 O-RING (7) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(3) Put the O-ring (7) in position on the low level switch (8).
(4) Put the low level switch (8) in position in the reservoir (1).
(5) Install the bolts (10) and the washers (9).
(6) Remove the blanking caps from the electrical connector (11) and from the receptacle.
(7) Make sure that all the electrical connections are clean and in the correct condition.
(8) Connect the electrical connector (11).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 29-11-41-865-061-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | H12 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | R35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/LOW/LVL/IND | 1832GQ | N32 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
C. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 29-11-41-710-051-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/HYD/QTY/IND | 1831GQ | P35 |
D. Test
(1) Do the operational test of the fluid low-level warning system (Ref. AMM TASK 29-31-00-710-001).
Subtask 29-11-41-790-051-A (1) Do the operational test of the fluid low-level warning system (Ref. AMM TASK 29-31-00-710-001).
NOTE: Do only the steps of the test applicable for the Green hydraulic system.
E. Leak Test of the Hydraulic Connections
(1) Examine the connection of the low level switch (8) and the reservoir (1).
(2) Make sure that there are no leaks.
Subtask 29-11-41-870-051-A (1) Examine the connection of the low level switch (8) and the reservoir (1).
(2) Make sure that there are no leaks.
F. Bleeding Procedure
(1) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001).
(2) Keep the system pressurized for 5 minutes to bleed the Green hydraulic system .
(3) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-23-00-864-001).
5. Close-up(1) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001).
(2) Keep the system pressurized for 5 minutes to bleed the Green hydraulic system .
(3) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-23-00-864-001).
Subtask 29-11-41-860-060-A
A. Put the aircraft back to the serviceable condition.
(1) Make sure that the level of fluid in the reservoir of the Green hydraulic system is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(2) Connect the isolation coupling of the power transfer unit (Ref. AMM TASK 29-23-00-860-002).
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(5) Remove the container.
(6) Remove the access platform(s).
(7) Remove the WARNING NOTICE(S).
(8) Make sure that the work area is clean and clear of tools and other items.
(9) Close the main doors of the main gear (Ref. AMM TASK 32-12-00-410-001).
Subtask 29-11-41-865-060-A (1) Make sure that the level of fluid in the reservoir of the Green hydraulic system is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(2) Connect the isolation coupling of the power transfer unit (Ref. AMM TASK 29-23-00-860-002).
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(5) Remove the container.
(6) Remove the access platform(s).
(7) Remove the WARNING NOTICE(S).
(8) Make sure that the work area is clean and clear of tools and other items.
(9) Close the main doors of the main gear (Ref. AMM TASK 32-12-00-410-001).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/HYD/QTY/IND | 1831GQ | P35 |