DOC AIRBUS | AMM A320FInstallation of the Accumulator-Air Pressure Gage
TASK 29-12-21-400-001-A
Installation of the Accumulator-Air Pressure Gage
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 29-12-21-860-052-A
Subtask 29-12-21-420-050-A
Subtask 29-12-21-410-050-A
[Rev.10 from 2021]
2026.04.01 07:51:07 UTC
Installation of the Accumulator-Air Pressure Gage
FIN: 2072GM
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 2 | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 1.65 and 1.54 m.daN (12.17 and 11.36 lbf.ft )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| (Material No.14CCB6) | Testing Medium-Leak Detection - Oxygen System |
| No specific | lockwire 0.8 mm (0.032 in.) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 195BB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| TASK 12-14-29-614-001-A | Fill the Hydraulic Power Accumulators with Nitrogen |
| 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 29-10-00-863-003-A | Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-863-003-A-01 | Pressurize the Blue Hydraulic System with the Blue Electric Pump |
| 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) |
Pressure GageSubtask 29-12-21-860-052-A
A. Aircraft Maintenance Configuration
(2) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Blue hydraulic system:
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the reservoir of the Blue hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(5) Make sure that the access door 195BB is open .
Subtask 29-12-21-865-051-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 Blue hydraulic system:
- in the cockpit on the hydraulic section 40VU of the overhead panel,
- on the ground service panel of the Blue hydraulic system.
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the reservoir of the Blue hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(5) Make sure that the access door 195BB is open .
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | HYD/HYD PWR/B WARN/& CTL | 2702GJ | C12 |
| 121VU | HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST | 1881GP | N35 |
| 123VU | B HYD/ELEC PUMP | 2701GJ | AB09 |
Subtask 29-12-21-420-050-A
A. Installation of the Pressure Gage
(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 pressure gage (1) and the adapter (3).
(4) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the pressure gage connection.
(5) Install the pressure gage (1) on the adapter (3).
.
(7) Safety the nut (2) with lockwire 0.8 mm (0.032 in.).
Subtask 29-12-21-860-053-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 pressure gage (1) and the adapter (3).
(4) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the pressure gage connection.
(5) Install the pressure gage (1) on the adapter (3).
NOTE: Make sure that you can clearly read the pressure gage when it is installed.
(6) TORQUE the nut (2) to between 1.65 and 1.54 m.daN (12.17 and 11.36 lbf.ft ) . (7) Safety the nut (2) with lockwire 0.8 mm (0.032 in.).
B. Preparation for Test
(1) Fill the accumulator with nitrogen (Ref. AMM TASK 12-14-29-614-001).
(2) Remove the warning notices from the cockpit and the ground service panel.
(3) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(4) Make sure that the fluid level in the reservoir of the Blue hydraulic system is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
(5) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
Subtask 29-12-21-790-050-A (1) Fill the accumulator with nitrogen (Ref. AMM TASK 12-14-29-614-001).
(2) Remove the warning notices from the cockpit and the ground service panel.
(3) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(4) Make sure that the fluid level in the reservoir of the Blue hydraulic system is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
(5) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
C. Test
(1) Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connection of the pressure gage (1) and the adapter (3) and make sure that there are no leaks.
(2) Make sure that the pressure gage (1) shows 3000 +100 -100 psi.
5. Close-up(1) Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connection of the pressure gage (1) and the adapter (3) and make sure that there are no leaks.
(2) Make sure that the pressure gage (1) shows 3000 +100 -100 psi.
Subtask 29-12-21-410-050-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 195BB.
Subtask 29-12-21-865-052-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 195BB.