DOC AIRBUS | AMM A320FInstallation of a Potable Water-Shutoff Valve
TASK 38-12-14-400-001-A
Installation of a Potable Water-Shutoff Valve
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels
B. Referenced Information
3. Job Set-up
Subtask 38-12-14-860-050-A
Subtask 38-12-14-670-050-A
Subtask 38-12-14-790-051-B
[Rev.10 from 2021]
2026.04.02 06:25:39 UTC
Installation of a Potable Water-Shutoff Valve
NOTE: The installation of the shutoff valve is the same in all the lavatories.
ZONE: 200
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Work Zones and Access Panels
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 200 | UPPER HALF FUSELAGE |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-15-38-613-001-A | Fill the Potable Water Tank System (Aircraft Electrical Power Available) |
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| 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 25-45-22-400-001-A | Installation of the Toilet Shroud and the Seat |
| TASK 38-10-00-614-001-A | Pressurization of the Potable Water System from a Ground Air Supply |
| TASK 38-10-00-614-002-A | Depressurization of the Potable Water System |
| TASK 38-10-00-670-805-A | Local Disinfection of the Potable-Water System Components |
Shutoff ValveSubtask 38-12-14-860-050-A
A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the potable water system is depressurized (Ref. AMM TASK 38-10-00-614-002).
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
Subtask 38-12-14-865-054-A (1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the potable water system is depressurized (Ref. AMM TASK 38-10-00-614-002).
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
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 | WATER SYSTEM-QANT-IND | 1MA | B01 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER SYS-QUANT-IND | 1MA | B06 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER SYS-DRAIN | 1MP | B05 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER-SYS-DRAIN | 1MP | B05 |
Subtask 38-12-14-670-050-A
A. Local Disinfection
(1) Do the local disinfection of the potable-water system components (Ref. AMM TASK 38-10-00-670-805).
Subtask 38-12-14-420-050-C (1) Do the local disinfection of the potable-water system components (Ref. AMM TASK 38-10-00-670-805).
B. Installation of the Shutoff Valve (12)
(1) If removed install the control rod (2).
(a) Put the bracket (3) in position on the lavatory (15).
(b) Install the counter sink screws (1) the washers (14) and the nuts (13).
(2) If removed, install the bracket (9) to the shutoff valve (12) with the washers (10) and the screws (11).
(3) Put the brackets (9) and (6) and the shutoff valve (12) in position against the structure (7).
(4) Make sure that the control lever (2) is in position on the shutoff valve (12).
(5) Install the counter sink washers (5) and the counter sink screws (4).
(6) Connect the connections (8).
Subtask 38-12-14-865-055-A (1) If removed install the control rod (2).
(a) Put the bracket (3) in position on the lavatory (15).
(b) Install the counter sink screws (1) the washers (14) and the nuts (13).
(2) If removed, install the bracket (9) to the shutoff valve (12) with the washers (10) and the screws (11).
(3) Put the brackets (9) and (6) and the shutoff valve (12) in position against the structure (7).
(4) Make sure that the control lever (2) is in position on the shutoff valve (12).
(5) Install the counter sink washers (5) and the counter sink screws (4).
(6) Connect the connections (8).
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 2000VU | WATER SYSTEM-QANT-IND | 1MA | B01 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER SYS-QUANT-IND | 1MA | B06 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER SYS-DRAIN | 1MP | B05 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER-SYS-DRAIN | 1MP | B05 |
Subtask 38-12-14-790-051-B
A. Leak check
(1) If necessary fill the potable water system (Ref. AMM TASK 12-15-38-613-001).
(2) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001).
(3) Make sure the shutoff valve (12) is in the OPEN position.
(4) Examine the shutoff valve (12) for leaks.
Subtask 38-12-14-410-051-C (1) If necessary fill the potable water system (Ref. AMM TASK 12-15-38-613-001).
(2) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001).
(3) Make sure the shutoff valve (12) is in the OPEN position.
(4) Examine the shutoff valve (12) for leaks.
NOTE: No leaks are permitted.
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the container.
(3) Install the toilet shroud (Ref. AMM TASK 25-45-22-400-001).
(4) Close the sanitary cabinet door.
(5) Close the door of lavatory.
Subtask 38-12-14-862-050-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the container.
(3) Install the toilet shroud (Ref. AMM TASK 25-45-22-400-001).
(4) Close the sanitary cabinet door.
(5) Close the door of lavatory.