DOC AIRBUS | AMM A320FInstallation of the Drain Valve (Air Stop Valve) in the Lavatories
TASK 38-32-41-400-001-A
Installation of the Drain Valve (Air Stop Valve) in the Lavatories
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 38-32-41-860-050-A
Subtask 38-32-41-420-051-B ** ON A/C NOT FOR ALL
Subtask 38-32-41-410-052-A
[Rev.10 from 2021]
2026.04.02 06:25:58 UTC
Installation of the Drain Valve (Air Stop Valve) in the Lavatories
WARNING:
ALWAYS USE RUBBER GLOVES WHEN YOU DO WORK:
- ON THE TOILET WASTE SYSTEM, OR
- ON PARTS THAT HAVE CONTAMINATION FROM THE WASTE SYSTEM.
WARNING:
DO NOT DO WORK ON THE TOILET WASTE SYSTEM AND THE POTABLE WATER SYSTEM AT THE SAME TIME. THIS WILL PREVENT CONTAMINATION OF THE POTABLE WATER SYSTEM. SUCH CONTAMINATION CAN BE DANGEROUS TO HEALTH.
NOTE: The procedure for the installation of all the drain valves in the lavatories is the same.
ZONE: 260
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 3 L(3/4 USGAL) |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 260 | AFT CABIN UTILITY AREA |
| 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 38-32-00-710-002-A | Operational Test of the Waste/Water Drain System |
Drain ValveSubtask 38-32-41-860-050-A
A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the door of the related lavatory is open.
(3) Make sure that the access door of the related potable-water shutoff valve (8) is open.
(4) Make sure that the related potable-water shutoff valve (8) is closed.
(5) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to open the potable-water shutoff valve (8).
Subtask 38-32-41-865-053-A (1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the door of the related lavatory is open.
(3) Make sure that the access door of the related potable-water shutoff valve (8) is open.
(4) Make sure that the related potable-water shutoff valve (8) is closed.
(5) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to open the potable-water shutoff valve (8).
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 | |||
| 2000VU | LAV FWD & MID-HOT WATER-A | 1MB | F02 |
| ** ON A/C NOT FOR ALL | |||
| 2000VU | LAV FWD-HOT WATER-A | 1MB | F02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAVATORY AFT-HOT WATER-D | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-E | 9MB | B03 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-D | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-G | 9MB | B03 |
| 2001VU | LAV AFT-HOT WATER-D/F | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER | 9MB | B03 |
| 2001VU | LAV AFT-HOT WATER | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-E/L | 9MB | B03 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-L | 9MB | C04 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-D/L | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-M | 9MB | B03 |
Subtask 38-32-41-420-051-B ** ON A/C NOT FOR ALL
A. Installation of the Drain Valve 4251MM
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Put the drain valve (5) in position.
(5) Install the washers (4) and the screws (3).
(6) Remove the blanking plugs and install the hoses (2) and (6).
(7) Install the clamps (1).
(8) Open the shut off valve (7).
(9) Close the access panel to the potable water shut off valve.
Subtask 38-32-41-420-051-D ** ON A/C NOT FOR ALL (1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Put the drain valve (5) in position.
(5) Install the washers (4) and the screws (3).
(6) Remove the blanking plugs and install the hoses (2) and (6).
(7) Install the clamps (1).
(8) Open the shut off valve (7).
(9) Close the access panel to the potable water shut off valve.
A. Installation of the Drain Valve 4251MM
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Put drain valve (5) in its installation position.
(5) Install the washers (4) and the screws (3).
(6) Remove the blanking plugs and connect the hoses (6) and (2).
(7) Install the clamps (7) and (1).
Subtask 38-32-41-420-051-R ** ON A/C NOT FOR ALL (1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Put drain valve (5) in its installation position.
(5) Install the washers (4) and the screws (3).
(6) Remove the blanking plugs and connect the hoses (6) and (2).
(7) Install the clamps (7) and (1).
A. Installation of the Drain Valve
(1) Make sure that the CONTAINER 3 L(3/4 USGAL) is below the washbasin to collect the water.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Make sure that the parts retained from the removed component are clean and in the correct condition.
(5) Put the drain valve (6) in its installation position.
(6) Install the washers (2), the screws (1) and the nuts (3).
(7) Tighten the nuts (3).
(8) Remove the PLUG-BLANKING from each disconnected line end.
(9) Connect the hoses (5) and (7) to the drain valve (6).
(10) Put the clamps (4) on the hoses (5) and (7).
(11) Tighten the screws of the clamps (4).
(12) Remove the WARNING NOTICE(S) related to the potable-water shutoff valve (8).
(13) Turn the control handle to open the related potable-water shutoff valve (8).
Subtask 38-32-41-865-054-A (1) Make sure that the CONTAINER 3 L(3/4 USGAL) is below the washbasin to collect the water.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Make sure that the parts retained from the removed component are clean and in the correct condition.
(5) Put the drain valve (6) in its installation position.
(6) Install the washers (2), the screws (1) and the nuts (3).
(7) Tighten the nuts (3).
(8) Remove the PLUG-BLANKING from each disconnected line end.
(9) Connect the hoses (5) and (7) to the drain valve (6).
(10) Put the clamps (4) on the hoses (5) and (7).
(11) Tighten the screws of the clamps (4).
(12) Remove the WARNING NOTICE(S) related to the potable-water shutoff valve (8).
(13) Turn the control handle to open the related potable-water shutoff valve (8).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 38-32-41-710-050-A 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 2000VU | LAV FWD & MID-HOT WATER-A | 1MB | F02 |
| ** ON A/C NOT FOR ALL | |||
| 2000VU | LAV FWD-HOT WATER-A | 1MB | F02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAVATORY AFT-HOT WATER-D | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-E | 9MB | B03 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-D | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-G | 9MB | B03 |
| 2001VU | LAV AFT-HOT WATER-D/F | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER | 9MB | B03 |
| 2001VU | LAV AFT-HOT WATER | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-E/L | 9MB | B03 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-L | 9MB | C04 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-D/L | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-M | 9MB | B03 |
Subtask 38-32-41-410-052-A
A. Close Access
(1) Remove the CONTAINER 3 L(3/4 USGAL).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the access door of the related potable-water shutoff valve (8).
(4) Close the related lavatory door.
Subtask 38-32-41-862-051-A (1) Remove the CONTAINER 3 L(3/4 USGAL).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the access door of the related potable-water shutoff valve (8).
(4) Close the related lavatory door.