DOC AIRBUS | AMM A320FInstallation of the Alternate Brake Servovalve
TASK 32-43-27-400-001-A
Installation of the Alternate Brake Servovalve
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 32-43-27-941-053-A ** ON A/C NOT FOR ALL
Subtask 32-43-27-420-051-A ** ON A/C NOT FOR ALL
Subtask 32-43-27-942-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 00:49:04 UTC
Installation of the Alternate Brake Servovalve
WARNING:
MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.
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: 40GG ** ON A/C NOT FOR ALL
FIN: 41GG ** ON A/C NOT FOR ALL
FIN: 42GG ** ON A/C NOT FOR ALL
FIN: 43GG ** ON A/C NOT FOR ALL
1. Reason for the JobFIN: 41GG ** ON A/C NOT FOR ALL
FIN: 42GG ** ON A/C NOT FOR ALL
FIN: 43GG ** ON A/C NOT FOR ALL
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 4 | SEALS | AIPC 32-42-48-01-040 |
| 5 | RINGS | AIPC 32-42-48-01-050 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| 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 32-00-00-481-001-A | Installation of the Safety Devices on the Landing Gears |
| TASK 32-43-00-710-001-A | Operational Check of Alternate Braking System |
| TASK 32-43-00-870-002-A | Bleeding of the High Pressure Alternate Braking System |
Alternate Brake ServovalveSubtask 32-43-27-941-053-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On the panel 400VU:
Subtask 32-43-27-860-050-A ** ON A/C NOT FOR ALL (1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On the panel 400VU:
- make sure that the landing-gear control-lever 6GA is in the DOWN position
- make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the landing gear.
- the Green hydraulic system
- the Yellow hydraulic system.
B. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 3M (10 FT) is below the applicable false rear spar at the alternate brake manifold, at zone 571 or 671.
(2) Make sure that the isolation coupling of the PTU is disconnected (Ref. AMM TASK 29-23-00-860-001).
(3) Make sure that the Yellow and Green hydraulic systems are de-pressurized (Ref. AMM TASK 29-00-00-864-001) and (Ref. AMM TASK 29-10-00-864-002).
(4) Make sure that the applicable hydraulic reservoir has been depressurized (Ref. AMM TASK 29-14-00-614-001).
Subtask 32-43-27-865-051-A ** ON A/C NOT FOR ALL (1) Make sure that the ACCESS PLATFORM 3M (10 FT) is below the applicable false rear spar at the alternate brake manifold, at zone 571 or 671.
(2) Make sure that the isolation coupling of the PTU is disconnected (Ref. AMM TASK 29-23-00-860-001).
(3) Make sure that the Yellow and Green hydraulic systems are de-pressurized (Ref. AMM TASK 29-00-00-864-001) and (Ref. AMM TASK 29-10-00-864-002).
(4) Make sure that the applicable hydraulic reservoir has been depressurized (Ref. AMM TASK 29-14-00-614-001).
C. 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 | |||
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
| 121VU | HYDRAULIC/PARK BRK/CTL/STBY | 71GG | N37 |
| 121VU | HYDRAULIC/PARK BRK/CTL/NORM | 70GG | N36 |
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
Subtask 32-43-27-420-051-A ** ON A/C NOT FOR ALL
A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Lubricate the AIPC 32-42-48-01-040 SEALS (4) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
Subtask 32-43-27-420-050-A ** ON A/C NOT FOR ALL (1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Lubricate the AIPC 32-42-48-01-040 SEALS (4) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
B. Installation of the Alternate Brake Servovalve
(1) Remove the cover and install the seals (4) on the servovalve (2).
(2) Install the AIPC 32-42-48-01-050 RINGS (5) on the servovalve (2).
(3) Align the dowel with its locating-hole on the manifold and install the servovalve (2) with the screws (3).
(4) TORQUE the screws (3) to between 0.45 and 0.35 m.daN (39.82 and 30.97 lbf.in )
.
(5) Remove the CAP - BLANKING and connect the electrical connector (1).
Subtask 32-43-27-870-050-A ** ON A/C NOT FOR ALL (1) Remove the cover and install the seals (4) on the servovalve (2).
(2) Install the AIPC 32-42-48-01-050 RINGS (5) on the servovalve (2).
(3) Align the dowel with its locating-hole on the manifold and install the servovalve (2) with the screws (3).
(4) TORQUE the screws (3) to between 0.45 and 0.35 m.daN (39.82 and 30.97 lbf.in )
. (5) Remove the CAP - BLANKING and connect the electrical connector (1).
C. Bleed the System
(1) Bleed the alternate brake system (Ref. AMM TASK 32-43-00-870-002).
(2) Use clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to remove unwanted hydraulic fluid.
Subtask 32-43-27-865-052-A ** ON A/C NOT FOR ALL (1) Bleed the alternate brake system (Ref. AMM TASK 32-43-00-870-002).
(2) Use clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to remove unwanted hydraulic fluid.
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-43-27-860-052-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
| 121VU | HYDRAULIC/PARK BRK/CTL/STBY | 71GG | N37 |
| 121VU | HYDRAULIC/PARK BRK/CTL/NORM | 70GG | N36 |
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
E. Aircraft Configuration
(1) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(2) Pressurize the applicable hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).
Subtask 32-43-27-710-050-A ** ON A/C NOT FOR ALL (1) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(2) Pressurize the applicable hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).
F. Test
(1) Do an operational test of the alternate braking system (Ref. AMM TASK 32-43-00-710-001).
(2) Make sure that there are no hydraulic leaks at the interface of the alternate brake manifold and the servovalve.
5. Close-up(1) Do an operational test of the alternate braking system (Ref. AMM TASK 32-43-00-710-001).
(2) Make sure that there are no hydraulic leaks at the interface of the alternate brake manifold and the servovalve.
Subtask 32-43-27-942-050-A ** ON A/C NOT FOR ALL
A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the SAFETY BARRIER(S).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the SAFETY BARRIER(S).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.