DOC AIRBUS | AMM A320FDrain Accumulated Water from the Brake Dual-Distribution Valve (BDDV)
TASK 32-43-14-200-002-A
Drain Accumulated Water from the Brake Dual-Distribution Valve (BDDV)
Refer to the MPD TASK: 324314-01
DRAIN ACCUMULATED WATER FROM THE BRAKE DUAL DISTRIBUTION VALVE (BDDV)
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 32-43-14-861-051-A ** ON A/C NOT FOR ALL
Subtask 32-43-14-010-055-A ** ON A/C NOT FOR ALL
Subtask 32-43-14-410-053-A ** ON A/C NOT FOR ALL
[Rev.9 from 2019]
2026.04.01 00:48:54 UTC
Drain Accumulated Water from the Brake Dual-Distribution Valve (BDDV)
ZONE: 744
1. Reason for the JobRefer to the MPD TASK: 324314-01
DRAIN ACCUMULATED WATER FROM THE BRAKE DUAL DISTRIBUTION VALVE (BDDV)
NOTE: This task is not applicable for Post SB 32-1415 aircraft.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 744 | MAIN DOOR |
| 148FB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 24-42-00-862-001-A | De-energize the Ground Service Network Supplied from the External Power |
| TASK 29-10-00-864-002-A | Depressurize 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 |
| TASK 32-43-00-710-001-A | Operational Check of Alternate Braking System |
| TASK 32-43-14-000-001-A | Removal of the Dual-Valve Alternate Brake-Distribution |
| TASK 32-43-14-200-003-A | Detailed Visual inspection of the Alternate Brake Dual Distribution Valve (BDDV) for Corrosion |
| TASK 32-43-14-400-001-A | Installation of the Dual-Valve Alternate Brake-Distribution |
| TASK 53-35-13-000-001-A | Removal of the Belly Fairing Access Panels |
| TASK 53-35-13-400-001-A | Installation of the Belly Fairing Access Panels |
Brake Dual-Distribution ValveSubtask 32-43-14-861-051-A ** ON A/C NOT FOR ALL
A. Energize the Electrical Circuits
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
Subtask 32-43-14-860-054-A ** ON A/C NOT FOR ALL (1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
B. Aircraft Maintenance Configuration
(1) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the BDDV 2577GM.
(3) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(4) Put a CONTAINER 5 L (1.32 USGAL) below the drain hose to collect the water.
Subtask 32-43-14-010-052-A ** ON A/C NOT FOR ALL (1) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the BDDV 2577GM.
(3) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(4) Put a CONTAINER 5 L (1.32 USGAL) below the drain hose to collect the water.
C. Get Access
(1) If necessary, remove belly fairing access-panel 148FB (Ref. AMM TASK 53-35-13-000-001).
Subtask 32-43-14-941-053-A ** ON A/C NOT FOR ALL (1) If necessary, remove belly fairing access-panel 148FB (Ref. AMM TASK 53-35-13-000-001).
D. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system:
Subtask 32-43-14-865-055-A ** ON A/C NOT FOR ALL (1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system:
- On panel 40VU in the cockpit
- On the ground service panel of the Yellow hydraulic system.
E. Open, safety and tag this(these) circuit breaker(s):
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/HYD POWER/Y | 3803GX | N30 |
| 121VU | HYDRAULIC/Y HYD/PUMP ENG2/MONG | 3700GD | Q37 |
| 121VU | HYDRAULIC/Y HYD/PUMP ENG2/CTL | 3701GD | Q36 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
Subtask 32-43-14-010-055-A ** ON A/C NOT FOR ALL
A. Removal of the Drain Hose
(1) Disconnect the drain hose (3):
(a) Make a mark on the clamps and hydraulic lines for the correct position for installation.
(b) Remove the nut (9) and the washer (10).
(c) Pull the drain hose (3) away from the screw (13). Make sure that you collect the spacer (12).
(d) Remove the nut (8), the washer (7) and the screw (5).
(e) Remove the clamp (2) and the plug (1).
Subtask 32-43-14-210-053-A ** ON A/C NOT FOR ALL (1) Disconnect the drain hose (3):
(a) Make a mark on the clamps and hydraulic lines for the correct position for installation.
(b) Remove the nut (9) and the washer (10).
(c) Pull the drain hose (3) away from the screw (13). Make sure that you collect the spacer (12).
(d) Remove the nut (8), the washer (7) and the screw (5).
(e) Remove the clamp (2) and the plug (1).
B. Drain Accumulated Water from the Brake Dual-Distribution Valve (BDDV)
(1) Drain the contents of the drain hose (3) into the container.
(2) If you think that there is ice in the cover, do a check for ice. If ice is found, remove the ice and do the procedure for corrosion inspection (Ref. AMM TASK 32-43-14-200-003).
(4) If you find hydraulic fluid in the drain hose (3), replace the brake dual-distribution valve (Ref. AMM TASK 32-43-14-000-001) (Ref. AMM TASK 32-43-14-400-001).
Subtask 32-43-14-410-056-A ** ON A/C NOT FOR ALL (1) Drain the contents of the drain hose (3) into the container.
(2) If you think that there is ice in the cover, do a check for ice. If ice is found, remove the ice and do the procedure for corrosion inspection (Ref. AMM TASK 32-43-14-200-003).
NOTE: If there is water in the cover, it can become ice in flight or in cold weather conditions. This can cause a blockage in the drain hose (3).
(3) If you find water in the drain hose (3), do the procedure for corrosion inspection (Ref. AMM TASK 32-43-14-200-003). (4) If you find hydraulic fluid in the drain hose (3), replace the brake dual-distribution valve (Ref. AMM TASK 32-43-14-000-001) (Ref. AMM TASK 32-43-14-400-001).
C. Installation of the Drain Hose
(1) Connect the drain hose (3):
(a) Put the clamp (2) on the drain hose (3) and install the plug (1).
(b) Put the drain hose (3) in position and install the spacer (12) on the screw (13).
(c) Put the clamp (11) in position and install the washer (10) and the nut (9).
(d) Put the clamps (4) and (6) in position and install the screw (5), the washer (7) and the nut (8).
(2) Make sure that the work area is clean and clear of tools and other items.
Subtask 32-43-14-865-056-A ** ON A/C NOT FOR ALL (1) Connect the drain hose (3):
(a) Put the clamp (2) on the drain hose (3) and install the plug (1).
(b) Put the drain hose (3) in position and install the spacer (12) on the screw (13).
(c) Put the clamp (11) in position and install the washer (10) and the nut (9).
(d) Put the clamps (4) and (6) in position and install the screw (5), the washer (7) and the nut (8).
(2) Make sure that the work area is clean and clear of tools and other items.
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-43-14-942-054-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/HYD POWER/Y | 3803GX | N30 |
| 121VU | HYDRAULIC/Y HYD/PUMP ENG2/MONG | 3700GD | Q37 |
| 121VU | HYDRAULIC/Y HYD/PUMP ENG2/CTL | 3701GD | Q36 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
E. Removal of Equipment
(1) Remove the WARNING NOTICE(S).
Subtask 32-43-14-710-052-A ** ON A/C NOT FOR ALL (1) Remove the WARNING NOTICE(S).
F. Operational Test
(1) Do the operational test of the alternate braking system with anti-skid (Ref. AMM TASK 32-43-00-710-001).
5. Close-up(1) Do the operational test of the alternate braking system with anti-skid (Ref. AMM TASK 32-43-00-710-001).
NOTE: It is only necessary to do the operational test of the alternate braking system with anti-skid if:
- Water or hydraulic contamination is found in the drain hose of the brake dual-distribution valve.
Subtask 32-43-14-410-053-A ** ON A/C NOT FOR ALL
A. Close Access
(1) If removed, install belly fairing access-panel 148FB (Ref. AMM TASK 53-35-13-400-001).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the access platform.
(4) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
Subtask 32-43-14-862-051-A ** ON A/C NOT FOR ALL (1) If removed, install belly fairing access-panel 148FB (Ref. AMM TASK 53-35-13-400-001).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the access platform.
(4) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
B. De-energize the Electrical Circuits
(1) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(1) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).