DOC AIRBUS | AMM A320FDisinfection of the Potable Water System with Ozone
TASK 38-10-00-670-804-A
Disinfection of the Potable Water System with Ozone
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 38-10-00-861-067-A
Subtask 38-10-00-670-080-A ** ON A/C NOT FOR ALL
Subtask 38-10-00-865-085-A
[Rev.10 from 2021]
2026.04.01 12:39:51 UTC
Disinfection of the Potable Water System with Ozone
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
WARNING:
MAKE SURE THAT THE EQUIPMENT YOU USE FOR THIS PROCEDURE IS CLEAN AND APPROVED FOR THE POTABLE WATER SYSTEM. IF NOT IT CAN CAUSE CONTAMINATION OF THE POTABLE WATER SYSTEM.
WARNING:
DO NOT DO WORK ON THE WASTE WATER 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: Before you do the disinfection procedure, do an analysis of the water you will use. Make sure that the analysis result is within the limits given for drinking water by the local authority.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 3 | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | CONTAINER 100 L(25 USGAL) |
| No specific | AR | OZONE MASK 10X WEL |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| 9001-000001 | 1 | AC POTABLE WATER DISINFECTION SYSTEM 110V |
| 9001-000002 | 1 | AC POTABLE WATER DISINFECTION SYSTEM 220V |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 133AL, 171AL, 172AR | |
| 192NB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-15-38-613-001-A | Fill the Potable Water Tank System (Aircraft Electrical Power Available) |
| TASK 12-24-38-680-001-A | Draining of the Potable Water System (with Electrical Power) |
| TASK 12-31-38-660-001-A | Cold Weather Maintenance - Water/Waste |
| TASK 12-33-21-618-001-A | Pre-conditioning through the LP Ground Connection (Aircraft Electrical Power Available) |
| TASK 12-33-21-618-001-A-01 | Pre-conditioning through the HP Ground Connection |
| TASK 12-33-21-618-001-A-02 | Pre-conditioning with the APU |
| TASK 12-33-21-618-001-A-03 | Pre-conditioning through the LP Ground Connection (Aircraft Electrical Power Not 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 38-12-23-920-802-A | Replacement of the Galley Water-Filter Elements |
| TASK 38-31-00-680-001-A | Draining of the Toilet System |
| TASK 52-10-00-010-001-A | Opening of the Passenger/Crew Door |
| TASK 52-10-00-410-001-A | Closing of the Passenger/Crew Door |
| TASK 25-35-00-00 | GALLEY EQUIPMENT - DESCRIPTION AND OPERATION |
Potable-Water Drain / Service PanelsSubtask 38-10-00-861-067-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 38-10-00-680-060-A (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
B. Draining of the Potable Water System
(1) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001).
Subtask 38-10-00-618-058-A (1) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001).
C. Preparation for Cold Weather Conditions
(1) Obey the cold-weather maintenance procedure, if necessary (Ref. AMM TASK 12-31-38-660-001).
Subtask 38-10-00-865-084-A (1) Obey the cold-weather maintenance procedure, if necessary (Ref. AMM TASK 12-31-38-660-001).
D. Open, safety and tag this(these) circuit breaker(s):
Subtask 38-10-00-010-070-A ** ON A/C NOT FOR ALL | 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 | VACU TOIL SYS-VACUUM-GEN | 33MG | A08 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER-SYS-DRAIN | 1MP | B05 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-VACU-GEN | 33MG | A08 |
E. Get Access
(1) Get access to the forward drain-panel:
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 133AL and open it.
(2) Get access to the mid drain-panel:
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 192NB and open it.
(3) Get access to the Potable-Water Service Panel (PWSP):
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 171AL and open it.
Subtask 38-10-00-010-070-B ** ON A/C NOT FOR ALL (1) Get access to the forward drain-panel:
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 133AL and open it.
(2) Get access to the mid drain-panel:
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 192NB and open it.
(3) Get access to the Potable-Water Service Panel (PWSP):
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 171AL and open it.
E. Get Access
(1) Get access to the forward potable-water drain-panel:
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 133AL and open it.
(2) Get access to the Potable-Water Service Panel (PWSP):
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 171AL and open it.
Subtask 38-10-00-860-060-A (1) Get access to the forward potable-water drain-panel:
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 133AL and open it.
(2) Get access to the Potable-Water Service Panel (PWSP):
(a) Put an ACCESS PLATFORM 1M(3 FT) below access door 171AL and open it.
F. Aircraft Maintenance Configuration
(1) In each lavatory and wet galley:
(a) Close the manual shutoff valve of the potable water system.
(b) Put the WARNING NOTICE(S) in position to tell persons not to use the potable water system because the disinfection is in progress.
(c) On the water heater, set the power switch to the OFF position.
(2) In each wet galley:
(a) Remove the galley water-filter elements (if installed) (Ref. AMM TASK 38-12-23-920-802):
1 If the caps and the filter elements are installed on the galley filter housings, remove them.
2 Do not install the new filter elements at this time.
3 If the caps are removed from the galley filter housings, install them and tighten the clamps.
4 If the canister is installed on the interface, remove it.
5 Do not install a new canister at this time.
6 Install the bypass connector on the interface and tighten it.
1 Find all the equipment connected to the potable water system (for example, the coffee maker, the water heater or the steam oven) (Ref. AMM D/O 25-35-00-00).
2 Remove the equipment you found. Refer to the related removal tasks for these components.
3 If necessary, send the components to the workshop to do the disinfection of the removed components and clean them.
(3) Make sure that there is a good airflow in the cabin during the procedure:
(a) Open the passenger/crew doors (Ref. AMM TASK 52-10-00-010-001).
(b) Do the pre-conditioning procedure (Ref. AMM TASK 12-33-21-618-001).
(4) Put the CONTAINER 100 L(25 USGAL) in position below each drain mast.
Subtask 38-10-00-941-066-A ** ON A/C NOT FOR ALL (1) In each lavatory and wet galley:
(a) Close the manual shutoff valve of the potable water system.
(b) Put the WARNING NOTICE(S) in position to tell persons not to use the potable water system because the disinfection is in progress.
(c) On the water heater, set the power switch to the OFF position.
(2) In each wet galley:
(a) Remove the galley water-filter elements (if installed) (Ref. AMM TASK 38-12-23-920-802):
1 If the caps and the filter elements are installed on the galley filter housings, remove them.
2 Do not install the new filter elements at this time.
3 If the caps are removed from the galley filter housings, install them and tighten the clamps.
4 If the canister is installed on the interface, remove it.
5 Do not install a new canister at this time.
6 Install the bypass connector on the interface and tighten it.
NOTE: The bypass connector is attached to the interface.
(b) Remove the equipment connected to the potable water system: 1 Find all the equipment connected to the potable water system (for example, the coffee maker, the water heater or the steam oven) (Ref. AMM D/O 25-35-00-00).
2 Remove the equipment you found. Refer to the related removal tasks for these components.
3 If necessary, send the components to the workshop to do the disinfection of the removed components and clean them.
(3) Make sure that there is a good airflow in the cabin during the procedure:
(a) Open the passenger/crew doors (Ref. AMM TASK 52-10-00-010-001).
(b) Do the pre-conditioning procedure (Ref. AMM TASK 12-33-21-618-001).
(4) Put the CONTAINER 100 L(25 USGAL) in position below each drain mast.
G. Installation of the Ground Support Equipment
(1) If removed, install the water-supply fitting to the 9001-000001 AC POTABLE WATER DISINFECTION SYSTEM 110V or 9001-000002 AC POTABLE WATER DISINFECTION SYSTEM 220V (referred to as the ground cart). Refer to the manufacturer's instructions.
(2) On the forward drain-panel, make sure that the handle (12) of the drain valve (11) is in the SHUT position.
(3) If installed, remove the protective caps from the fittings of the necessary hoses before you connect them.
(4) On the mid drain-panel:
(a) Make sure that the handle (6) of the drain valve (5) is in the CLOSED position.
(b) Make sure that the handle (1) of the overflow valve is in the CLOSED position.
(c) Install an overflow fitting (3) to the overflow nipple (2) and tighten the clamp (4).
(5) On the PWSP:
(a) Make sure that the handle (10) of the fill/drain valve is in the NORMAL position.
(b) Remove the cap (8) from the fill/drain nipple (7).
(c) Connect the long fill coupler of the fill hose (9) to the fill/drain nipple (7).
(6) On the ground cart (refer to the manufacturer's instructions):
(a) Remove the protective caps from the fittings.
(b) Connect the water supply hose to the EXTERNAL WATER SUPPLY fitting.
(c) Connect one end of the return hose to the RETURN port.
(d) Connect the fitting of the drain hose to the CART DRAIN port.
(e) Connect the short fill coupler of the fill hose (9) to the FILL port.
(7) Connect the open end of the drain hose to a drain container(s).
(8) Connect the return hose to the overflow fitting (3).
(9) Connect the water supply hose to the external water supply source. Do not open the source at this time.
Subtask 38-10-00-941-066-B ** ON A/C NOT FOR ALL (1) If removed, install the water-supply fitting to the 9001-000001 AC POTABLE WATER DISINFECTION SYSTEM 110V or 9001-000002 AC POTABLE WATER DISINFECTION SYSTEM 220V (referred to as the ground cart). Refer to the manufacturer's instructions.
(2) On the forward drain-panel, make sure that the handle (12) of the drain valve (11) is in the SHUT position.
(3) If installed, remove the protective caps from the fittings of the necessary hoses before you connect them.
(4) On the mid drain-panel:
(a) Make sure that the handle (6) of the drain valve (5) is in the CLOSED position.
(b) Make sure that the handle (1) of the overflow valve is in the CLOSED position.
(c) Install an overflow fitting (3) to the overflow nipple (2) and tighten the clamp (4).
(5) On the PWSP:
(a) Make sure that the handle (10) of the fill/drain valve is in the NORMAL position.
(b) Remove the cap (8) from the fill/drain nipple (7).
(c) Connect the long fill coupler of the fill hose (9) to the fill/drain nipple (7).
(6) On the ground cart (refer to the manufacturer's instructions):
(a) Remove the protective caps from the fittings.
(b) Connect the water supply hose to the EXTERNAL WATER SUPPLY fitting.
(c) Connect one end of the return hose to the RETURN port.
(d) Connect the fitting of the drain hose to the CART DRAIN port.
(e) Connect the short fill coupler of the fill hose (9) to the FILL port.
(7) Connect the open end of the drain hose to a drain container(s).
(8) Connect the return hose to the overflow fitting (3).
(9) Connect the water supply hose to the external water supply source. Do not open the source at this time.
G. Installation of the Ground Support Equipment
(1) If removed, install the water-supply fitting to the 9001-000001 AC POTABLE WATER DISINFECTION SYSTEM 110V or 9001-000002 AC POTABLE WATER DISINFECTION SYSTEM 220V (referred to as the ground cart). Refer to the manufacturer's instructions.
(2) On the forward potable-water drain-panel, make sure that the handle (2) of the drain valve (1) is in the SHUT position.
(3) If installed, remove the protective caps from the fittings of the necessary hoses before you connect them.
(4) On the PWSP:
(a) Make sure that the handle (3) of the fill/overflow valve is in the NORMAL position.
(b) Install an overflow fitting (8) to the overflow nipple (9) and tighten the clamp (7).
(c) Remove the cap (5) from the fill/drain nipple (4).
(d) Connect the long fill coupler of the fill hose (6) to the fill/drain nipple (4).
(5) On the ground cart (refer to the manufacturer's instructions):
(a) Remove the protective caps from the fittings.
(b) Connect the water supply hose to the EXTERNAL WATER SUPPLY fitting.
(c) Connect one end of the return hose to the RETURN port.
(d) Connect the fitting of the drain hose to the CART DRAIN port.
(e) Connect the short fill coupler of the fill hose (6) to the FILL port.
(6) Connect the open end of the drain hose to a drain container(s).
(7) Connect the return hose to the overflow fitting (8).
(8) Connect the water supply hose to the external water supply source. Do not open the source at this time.
4. Procedure(1) If removed, install the water-supply fitting to the 9001-000001 AC POTABLE WATER DISINFECTION SYSTEM 110V or 9001-000002 AC POTABLE WATER DISINFECTION SYSTEM 220V (referred to as the ground cart). Refer to the manufacturer's instructions.
(2) On the forward potable-water drain-panel, make sure that the handle (2) of the drain valve (1) is in the SHUT position.
(3) If installed, remove the protective caps from the fittings of the necessary hoses before you connect them.
(4) On the PWSP:
(a) Make sure that the handle (3) of the fill/overflow valve is in the NORMAL position.
(b) Install an overflow fitting (8) to the overflow nipple (9) and tighten the clamp (7).
(c) Remove the cap (5) from the fill/drain nipple (4).
(d) Connect the long fill coupler of the fill hose (6) to the fill/drain nipple (4).
(5) On the ground cart (refer to the manufacturer's instructions):
(a) Remove the protective caps from the fittings.
(b) Connect the water supply hose to the EXTERNAL WATER SUPPLY fitting.
(c) Connect one end of the return hose to the RETURN port.
(d) Connect the fitting of the drain hose to the CART DRAIN port.
(e) Connect the short fill coupler of the fill hose (6) to the FILL port.
(6) Connect the open end of the drain hose to a drain container(s).
(7) Connect the return hose to the overflow fitting (8).
(8) Connect the water supply hose to the external water supply source. Do not open the source at this time.
Subtask 38-10-00-670-080-A ** ON A/C NOT FOR ALL
A. Disinfection of the Potable-Water Distribution System with Ozone
(2) On the mid drain-panel turn the handle (1) to the OPEN position to open the overflow valve.
(3) On the PWSP:
(a) Turn the handle (10) from the NORMAL to the PULL TO FILL position.
(b) Pull the handle (10) out to the mechanical stop.
(4) Connect the ground cart to an applicable power supply.
(5) On the ground cart, set the power switch to the ON position. The green POWER indication light comes on.
(6) Start the water supply from the external source.
(7) On the ground cart:
(a) Set the timer to the approximate fill time related to the total tank capacity. Refer to Table 1.
(b) Make sure that the OZONE indication light comes on in 1 minute or less after timer activation.
Table 1
(8) Monitor the flow indicator on the fill hose (9) to make sure that water flows.
(a) If no water flows, turn off the power switch and do the troubleshooting on the water connection and the ground cart. Refer to the manufacturer's instructions.
(9) When recirculation starts, turn the timer to the approximate recirculation time related to the total tank capacity. Refer to Table 1.
Subtask 38-10-00-670-080-B ** ON A/C NOT FOR ALL WARNING:
ALWAYS WEAR RUBBER GLOVES, GOGGLES AND PROTECTIVE CLOTHES WHEN YOU DO THIS TASK.
CAUTION:
WHEN YOU DO THE EXTERNAL CLEANING, MAKE SURE THAT:
(1) In the cabin, make sure that all of the manual shutoff valves of the potable water system are closed. - THE SUPPLY PRESSURE OF CLEANING SOLUTIONS, WATER AND/OR COMPRESSED AIR IS NOT MORE THAN THE SPECIFIED VALUES.
- THE SPRAY GUN/NOZZLE IS AT THE SPECIFIED DISTANCE AND ANGLE FROM THE SURFACE.
(2) On the mid drain-panel turn the handle (1) to the OPEN position to open the overflow valve.
(3) On the PWSP:
(a) Turn the handle (10) from the NORMAL to the PULL TO FILL position.
(b) Pull the handle (10) out to the mechanical stop.
(4) Connect the ground cart to an applicable power supply.
(5) On the ground cart, set the power switch to the ON position. The green POWER indication light comes on.
(6) Start the water supply from the external source.
(7) On the ground cart:
(a) Set the timer to the approximate fill time related to the total tank capacity. Refer to Table 1.
(b) Make sure that the OZONE indication light comes on in 1 minute or less after timer activation.
Table 1
| System Size | Fill Time | Recirculation Time |
|---|---|---|
| 65 Gallons / 245 Liters | 10 min | 10 min |
| 120 Gallons / 455 Liters | 20 min | 15 min |
| 300 Gallons / 1135 Liters | 45 min | 30 min |
| 360 Gallons / 1360 Liters | 50 min | 35 min |
| 450 Gallons / 1700 Liters | 65 min | 45 min |
| 600 Gallons / 2270 Liters | 85 min | 60 min |
(a) If no water flows, turn off the power switch and do the troubleshooting on the water connection and the ground cart. Refer to the manufacturer's instructions.
(9) When recirculation starts, turn the timer to the approximate recirculation time related to the total tank capacity. Refer to Table 1.
NOTE: The recirculation starts when water comes back from the overflow and flows through the filter of the ground cart.
(10) After the water has recirculated for the specified time, set the timer to 60 minutes. A. Disinfection of the Potable-Water Distribution System with Ozone
(2) On the PWSP:
(a) Turn the handle (3) from the NORMAL to the PULL TO FILL position.
(b) Pull the handle (3) out to the mechanical stop.
(3) Connect the ground cart to an applicable power supply.
(4) On the ground cart, set the power switch to the ON position. The green POWER indication light comes on.
(5) Start the water supply from the external source.
(6) On the ground cart:
(a) Set the timer to the approximate fill time related to the total tank capacity. Refer to Table 1.
(b) Make sure that the OZONE indication light comes on in 1 minute or less after timer activation.
Table 1
(7) Monitor the flow indicator on the fill hose (6) to make sure that water flows.
(a) If no water flows, turn off the power switch and do the troubleshooting on the water connection and the ground cart. Refer to the manufacturer's instructions.
(8) When recirculation starts, turn the timer to the approximate recirculation time related to the total tank capacity. Refer to Table 1.
Subtask 38-10-00-865-097-A WARNING:
ALWAYS WEAR RUBBER GLOVES, GOGGLES AND PROTECTIVE CLOTHES WHEN YOU DO THIS TASK.
CAUTION:
WHEN YOU DO THE EXTERNAL CLEANING, MAKE SURE THAT:
(1) In the cabin, make sure that all of the manual shutoff valves of the potable water system are closed. - THE SUPPLY PRESSURE OF CLEANING SOLUTIONS, WATER AND/OR COMPRESSED AIR IS NOT MORE THAN THE SPECIFIED VALUES.
- THE SPRAY GUN/NOZZLE IS AT THE SPECIFIED DISTANCE AND ANGLE FROM THE SURFACE.
(2) On the PWSP:
(a) Turn the handle (3) from the NORMAL to the PULL TO FILL position.
(b) Pull the handle (3) out to the mechanical stop.
(3) Connect the ground cart to an applicable power supply.
(4) On the ground cart, set the power switch to the ON position. The green POWER indication light comes on.
(5) Start the water supply from the external source.
(6) On the ground cart:
(a) Set the timer to the approximate fill time related to the total tank capacity. Refer to Table 1.
(b) Make sure that the OZONE indication light comes on in 1 minute or less after timer activation.
Table 1
| System Size | Fill Time | Recirculation Time |
|---|---|---|
| 65 Gallons / 245 Liters | 10 min | 10 min |
| 120 Gallons / 455 Liters | 20 min | 15 min |
| 300 Gallons / 1135 Liters | 45 min | 30 min |
| 360 Gallons / 1360 Liters | 50 min | 35 min |
| 450 Gallons / 1700 Liters | 65 min | 45 min |
| 600 Gallons / 2270 Liters | 85 min | 60 min |
(a) If no water flows, turn off the power switch and do the troubleshooting on the water connection and the ground cart. Refer to the manufacturer's instructions.
(8) When recirculation starts, turn the timer to the approximate recirculation time related to the total tank capacity. Refer to Table 1.
NOTE: The recirculation starts when water comes back from the overflow and flows through the filter of the ground cart.
(9) After the water has recirculated for the specified time, set the timer to 60 minutes. B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 38-10-00-170-060-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-VACUUM-GEN | 33MG | A08 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-VACU-GEN | 33MG | A08 |
C. Flushing of the Potable Water System with Ozone
(1) Make sure that waste service-panel door 172AR is closed.
(3) In each lavatory:
(a) Open the manual shut-off valve.
(b) Flush the toilet 15 times.
(c) Set the water faucet to the cold position and let 3 l (0.8 USgal) of water flow through the washbasin.
(d) Set the water faucet to the hot position and let 3 l (0.8 USgal) of water flow through the washbasin.
(4) In each wet galley:
(a) Open the manual shut-off valve.
(b) From each potable water connection, let 5 l (1.3 USgal) of water flow through the sink.
(c) If applicable, open the water faucet and let 3 l (0.8 USgal) of water flow through the sink.
Subtask 38-10-00-080-052-A ** ON A/C NOT FOR ALL (1) Make sure that waste service-panel door 172AR is closed.
WARNING:
MAKE SURE THAT THERE IS A GOOD AIRFLOW IN THE CABIN DURING THIS PROCEDURE. OZONE IS A DANGEROUS GAS.
IF YOU BREATHE IT IN A HIGH CONCENTRATION, IT CAN CAUSE INJURY OR ILLNESS.
WARNING:
BEFORE YOU DO THIS PROCEDURE, PUT ON AN OZONE MASK WHICH GIVES GOOD PROTECTION AGAINST A HIGH OZONE CONCENTRATION (10 TIMES THE STANDARD LIMIT FOR OZONE IN AMBIENT AIR). IF YOU BREATHE A HIGH CONCENTRATION OF OZONE, INJURY TO YOUR LUNGS CAN OCCUR.
(2) Put on the OZONE MASK 10X WEL when you flush the potable water system with ozone. (3) In each lavatory:
(a) Open the manual shut-off valve.
(b) Flush the toilet 15 times.
(c) Set the water faucet to the cold position and let 3 l (0.8 USgal) of water flow through the washbasin.
(d) Set the water faucet to the hot position and let 3 l (0.8 USgal) of water flow through the washbasin.
(4) In each wet galley:
(a) Open the manual shut-off valve.
(b) From each potable water connection, let 5 l (1.3 USgal) of water flow through the sink.
(c) If applicable, open the water faucet and let 3 l (0.8 USgal) of water flow through the sink.
D. Disconnection of the Ground Support Equipment
(1) On the mid drain-panel, turn the handle (1) to the CLOSED position to close the overflow valve.
(2) On the PWSP, turn the handle (10) to the NORMAL position to close the fill/drain valve.
(3) On the ground cart, set the power switch to the OFF position.
(4) Stop the external water supply.
(5) Drain the hoses with an automatic drain function of the ground cart. Refer to the manufacturer's instructions.
(6) Disconnect the ground cart from the power source.
(7) On the PWSP:
(a) Disconnect the fill hose (9) from the fill/drain nipple (7).
(b) Install the cap (8) on the fill/drain nipple (7).
(8) On the mid drain-panel:
(a) Loosen the clamp (4).
(b) Remove the overflow fitting (3) from the overflow nipple (2).
Subtask 38-10-00-080-052-B ** ON A/C NOT FOR ALL (1) On the mid drain-panel, turn the handle (1) to the CLOSED position to close the overflow valve.
(2) On the PWSP, turn the handle (10) to the NORMAL position to close the fill/drain valve.
(3) On the ground cart, set the power switch to the OFF position.
(4) Stop the external water supply.
(5) Drain the hoses with an automatic drain function of the ground cart. Refer to the manufacturer's instructions.
(6) Disconnect the ground cart from the power source.
(7) On the PWSP:
(a) Disconnect the fill hose (9) from the fill/drain nipple (7).
(b) Install the cap (8) on the fill/drain nipple (7).
(8) On the mid drain-panel:
(a) Loosen the clamp (4).
(b) Remove the overflow fitting (3) from the overflow nipple (2).
D. Disconnection of the Ground Support Equipment
(1) On the PWSP, turn the handle (3) to the NORMAL position to close the fill/overflow valve.
(2) On the ground cart, set the power switch to the OFF position.
(3) Stop the external water supply.
(4) Drain the hoses with an automatic drain function of the ground cart. Refer to the manufacturer's instructions.
(5) Disconnect the ground cart from the power source.
(6) On the PWSP:
(a) Disconnect the fill hose (6) from the fill/drain nipple (4).
(b) Install the cap (5) on the fill/drain nipple (4).
(c) Loosen the clamp (7).
(d) Remove the overflow fitting (8) from the overflow nipple (10).
Subtask 38-10-00-680-061-A (1) On the PWSP, turn the handle (3) to the NORMAL position to close the fill/overflow valve.
(2) On the ground cart, set the power switch to the OFF position.
(3) Stop the external water supply.
(4) Drain the hoses with an automatic drain function of the ground cart. Refer to the manufacturer's instructions.
(5) Disconnect the ground cart from the power source.
(6) On the PWSP:
(a) Disconnect the fill hose (6) from the fill/drain nipple (4).
(b) Install the cap (5) on the fill/drain nipple (4).
(c) Loosen the clamp (7).
(d) Remove the overflow fitting (8) from the overflow nipple (10).
E. Draining of the Potable Water System
(1) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001).
Subtask 38-10-00-613-068-A (1) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001).
F. Filling of the Potable Water System
(1) Fill the potable water system to approximately of 30% of its total capacity (Ref. AMM TASK 12-15-38-613-001).
Subtask 38-10-00-170-061-A (1) Fill the potable water system to approximately of 30% of its total capacity (Ref. AMM TASK 12-15-38-613-001).
G. Flushing of the Potable Water System with Fresh Water
(1) In each lavatory:
(a) Flush the toilet 15 times.
(b) Set the water faucet to the cold position and let 3 l (0.8 USgal) water flow through the washbasin.
(c) Set the water faucet to the hot position and let 3 l (0.8 USgal) water flow through the washbasin.
(2) In each wet galley:
(a) From each potable water connection, let 5 l (1.3 USgal) water flow through the sink.
(b) If installed, open the water faucet and let 3 l (0.8 USgal) water flow through the sink.
Subtask 38-10-00-750-050-A (1) In each lavatory:
(a) Flush the toilet 15 times.
(b) Set the water faucet to the cold position and let 3 l (0.8 USgal) water flow through the washbasin.
(c) Set the water faucet to the hot position and let 3 l (0.8 USgal) water flow through the washbasin.
(2) In each wet galley:
(a) From each potable water connection, let 5 l (1.3 USgal) water flow through the sink.
(b) If installed, open the water faucet and let 3 l (0.8 USgal) water flow through the sink.
H. Testing of the Remaining Ozone with the Ozone Sam Kit
(2) Make sure that the quantity of ozone in the water is not more than the national regulations.
(3) If the quantity of ozone in the water is more than the national regulations:
5. Close-upNOTE: The ozone sam kit is a part of the ground cart equipment.
(1) In lavatory A, do a test of the remaining ozone in the water.(2) Make sure that the quantity of ozone in the water is not more than the national regulations.
(3) If the quantity of ozone in the water is more than the national regulations:
- Do the steps given in paragraphs 4.F and 4.G again to decrease the ozone level in the water.
Subtask 38-10-00-865-085-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 38-10-00-170-062-A | 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 |
B. Flushing of Lavatory A
(1) In the lavatory A, flush the toilet a minimum of 5 times.
Subtask 38-10-00-680-063-A (1) In the lavatory A, flush the toilet a minimum of 5 times.
NOTE: The flushing is necessary to remove remaining waste water from the vacuum lines.
C. Draining
(1) If necessary, drain the potable water system (Ref. AMM TASK 12-24-38-680-001).
(2) If necessary, drain the toilet system (Ref. AMM TASK 38-31-00-680-001).
Subtask 38-10-00-410-073-A ** ON A/C NOT FOR ALL (1) If necessary, drain the potable water system (Ref. AMM TASK 12-24-38-680-001).
(2) If necessary, drain the toilet system (Ref. AMM TASK 38-31-00-680-001).
D. Close Access
(1) Close the access doors:
(a) Close access doors 133AL, 192NB and 171AL.
(b) Make sure that the latches are correctly locked.
(c) Make sure that the doors are flush with the skin of the aircraft.
(2) Remove the container from below the drain masts.
(3) Remove the access platform(s).
(4) On the ground cart:
(a) Disconnect the hoses.
(b) Install the protective caps on the related fittings.
(5) Disconnect the return hose from the overflow fitting.
(6) On the hoses, install the protective caps on the related fittings.
Subtask 38-10-00-410-073-B ** ON A/C NOT FOR ALL (1) Close the access doors:
(a) Close access doors 133AL, 192NB and 171AL.
(b) Make sure that the latches are correctly locked.
(c) Make sure that the doors are flush with the skin of the aircraft.
(2) Remove the container from below the drain masts.
(3) Remove the access platform(s).
(4) On the ground cart:
(a) Disconnect the hoses.
(b) Install the protective caps on the related fittings.
(5) Disconnect the return hose from the overflow fitting.
(6) On the hoses, install the protective caps on the related fittings.
D. Close Access
(1) Close the access doors:
(a) Close access doors 133AL and 171AL.
(b) Make sure that the latches are correctly locked.
(c) Make sure that the doors are flush with the skin of the aircraft.
(2) Remove the container from below the drain masts.
(3) Remove the access platform(s).
(4) On the ground cart:
(a) Disconnect the hoses.
(b) Install the protective caps on the related fittings.
(5) Disconnect the return hose from the overflow fitting.
(6) On the hoses, install the protective caps on the related fittings.
Subtask 38-10-00-410-075-A (1) Close the access doors:
(a) Close access doors 133AL and 171AL.
(b) Make sure that the latches are correctly locked.
(c) Make sure that the doors are flush with the skin of the aircraft.
(2) Remove the container from below the drain masts.
(3) Remove the access platform(s).
(4) On the ground cart:
(a) Disconnect the hoses.
(b) Install the protective caps on the related fittings.
(5) Disconnect the return hose from the overflow fitting.
(6) On the hoses, install the protective caps on the related fittings.
E. Close Access
(1) In each wet galley:
(a) Install the galley water-filter elements (if removed) (Ref. AMM TASK 38-12-23-920-802):
1 If removed, install new filter elements to the related galley filter housings.
2 If installed, remove the bypass connectors from the related interfaces.
3 If removed, install new canisters to the related interfaces.
4 Do the leak check.
(b) Install all equipment connected to the potable water system which you removed for cleaning in the shop. Refer to the related installation tasks of these components.
(2) In each lavatory and wet galley:
(a) Remove the warning notice(s).
(b) Set the switch on the water heater to the ON position.
(c) Make sure that the manual shut-off valve is open.
(3) Close the passenger/crew doors (Ref. AMM TASK 52-10-00-410-001).
(4) Stop the pre-conditioning procedure (Ref. AMM TASK 12-33-21-618-001).
Subtask 38-10-00-613-069-A Subtask 38-10-00-862-058-A (1) In each wet galley:
(a) Install the galley water-filter elements (if removed) (Ref. AMM TASK 38-12-23-920-802):
1 If removed, install new filter elements to the related galley filter housings.
2 If installed, remove the bypass connectors from the related interfaces.
3 If removed, install new canisters to the related interfaces.
4 Do the leak check.
(b) Install all equipment connected to the potable water system which you removed for cleaning in the shop. Refer to the related installation tasks of these components.
(2) In each lavatory and wet galley:
(a) Remove the warning notice(s).
(b) Set the switch on the water heater to the ON position.
(c) Make sure that the manual shut-off valve is open.
(3) Close the passenger/crew doors (Ref. AMM TASK 52-10-00-410-001).
(4) Stop the pre-conditioning procedure (Ref. AMM TASK 12-33-21-618-001).