DOC AIRBUS | AMM A320FDisinfection of the Water Tank and the Distribution System with Calcium Hypochlorite or Sodium Hypochlorite
TASK 38-10-00-670-003-A
Disinfection of the Water Tank and the Distribution System with Calcium Hypochlorite or Sodium Hypochlorite
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 38-10-00-861-058-A Subtask 38-10-00-680-051-A
Subtask 38-10-00-670-056-A ** ON A/C NOT FOR ALL
Subtask 38-10-00-560-062-A
[Rev.10 from 2021]
2026.04.01 01:17:38 UTC
Disinfection of the Water Tank and the Distribution System with Calcium Hypochlorite or Sodium Hypochlorite
WARNING:
ALWAYS WEAR RUBBER GLOVES, GOGGLES AND PROTECTIVE CLOTHES WHEN YOU DO THIS TASK.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
WARNING:
REFER TO THE MANUFACTURER'S MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIAL INFORMATION. THIS INCLUDES HAZARDOUS INGREDIENTS, PHYSICAL AND CHEMICAL CHARACTERISTICS, FIRE, EXPLOSION, REACTIVITY, HEALTH HAZARD DATA, PRECAUTIONS FOR SAFE HANDLING, AND USE OF CONTROL MEASURES.
NOTE: Before you do the disinfection procedure, it is necessary to do an analysis of the water you will use.
1. Reason for the JobNOTE: There is an alternative method for this procedure. This task gives one of the methods. For the other method, refer to the other tasks in this page block.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 2 | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | CART - GROUND, NITROGEN |
| No specific | 1 | CART - SERVICING, WATER, POTABLE |
| No specific | 1 | CONTAINER 100 L(25 USGAL) |
| No specific | 1 | CONTAINER 300 L(80 USGAL) |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | 2 | FLASHLIGHT |
| No specific | 1 | HOSE - VINYL |
| No specific | 2 | MIRROR - INSPECTION, FLEXIBLE |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| No specific | 1 | WATER SOURCE - GROUND |
| 98D38108005000 | 2 | SUPP-POT_WATER,DISINF |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.11AKB1) | Disinfectant-Potable Water System Hypochlorite - |
| No specific | Test Strips for Free Chlorine |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 133AL, 171AL | |
| 192NB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-15-38-613-001-A | Fill the Potable Water Tank System (Aircraft Electrical Power Available) |
| TASK 12-15-38-613-002-A | Fill the Potable Water Tank System (Aircraft Electrical Power not Available) |
| TASK 12-24-38-680-001-A | Draining of the Potable Water System (with Electrical Power) |
| TASK 12-24-38-680-002-A | Draining of the Potable Water System (without 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 24-42-00-861-001-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 38-10-00-614-001-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 38-10-00-614-003-A | Pressurization of the Potable Water System with the Compressor |
| TASK 38-12-23-920-802-A | Replacement of the Galley Water-Filter Elements |
| TASK 38-12-41-000-006-A | Removal of the Nozzle Assembly |
| TASK 38-12-41-000-006-A-01 | Removal of the Nozzle Assembly |
| TASK 38-12-41-400-006-A | Installation of the Nozzle Assembly |
| TASK 38-12-41-400-006-A-01 | Installation of the Nozzle Assembly |
| TASK 25-35-00-00 | GALLEY EQUIPMENT - DESCRIPTION AND OPERATION |
Subtask 38-10-00-861-058-A Subtask 38-10-00-680-051-A
B. Drain the potable water system (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002).
Subtask 38-10-00-560-059-A C. Preparation of the Disinfectant Solution with Calcium Hypochlorite or Sodium Hypochlorite
Table 1
or
Table 2
(a) Mix the dissolved solution with 250 l (66.0425 USgal) of water in a CONTAINER 300 L(80 USGAL) to make the disinfectant solution (referred to as the solution).
Subtask 38-10-00-618-051-A WARNING:
ALWAYS WEAR RUBBER GLOVES, GOGGLES AND PROTECTIVE CLOTHES WHEN YOU DO THIS TASK.
WARNING:
DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
(1) Mix the Disinfectant-Potable Water System Hypochlorite - (Material No.11AKB1) with water at a temperature of 20 +4 deg.C or -4 deg.C (68.00 +7.20 deg.F or -7.20 deg.F) in a CONTAINER 5 L (1.32 USGAL) as given in table 1 or table 2. - FLUSH IT AWAY WITH CLEAN WATER
- GET MEDICAL AID.
NOTE: Airbus recommends:
- To use the water from the cold water tap for the disinfection of the potable water system.
- Not to keep the water or the disinfectant solution in a very cold or very hot condition before you do the disinfection procedure.
NOTE: The mixture given in table 1 and table 2 is for a concentration of 100 parts per million for a volume of 250 l (66.0425 USgal) of water.
Table 1
| A/C Type | Number of tanks | Usable tank volume in l (USgal) | Volume water needed for disinfection solution in l (USgal) * | Calcium hypochlorite (70%) (CML 14 003E) in g (ounces) | Sodium hypochlorite (13%) (CML 14 003F) in l (Usgal) |
|---|---|---|---|---|---|
| A318,A319 A320,A321 | 1 | 200 (53) | 250 (66) | - | 0.16 (0.04) |
Table 2
| A/C Type | Number of tanks | Usable tank volume in l (USgal) | Volume water needed for disinfection solution in l (USgal) * | Calcium hypochlorite (70%) (CML 14 003E) in g (ounces) | Sodium hypochlorite (13%) (CML 14 003F) in l (Usgal) |
|---|---|---|---|---|---|
| A318,A319 A320,A321 | 1 | 200 (53) | 250 (66) | 36 (1.3) | - |
NOTE: The percent values of the mixtures given in table 1 and table 2 are the concentration of Free Available Chlorine (FAC).
NOTE: The specifications shown in table 1 and table 2 are only for the materials used in table 1 and table 2. If the airline uses other disinfectant materials, it is necessary to obey the mixing instructions from the manufacturer of those materials.
NOTE: If you think that there is a large amount of contamination in the potable water system:
(2) Prepare the disinfectant solution: - It is necessary to let the disinfection solution flow longer through the water faucets in the lavatories and in the galleys.
- This is to make sure that the potable water system is clean.
(a) Mix the dissolved solution with 250 l (66.0425 USgal) of water in a CONTAINER 300 L(80 USGAL) to make the disinfectant solution (referred to as the solution).
D. Preparation of Cold Weather Conditions
(1) Obey the cold-weather maintenance procedure (Ref. AMM TASK 12-31-38-660-001).
(2) If the temperature in the aircraft is below 4 DEG.C (39.20 DEG.F), do the pre-conditioning procedure (Ref. AMM TASK 12-33-21-618-001).
Subtask 38-10-00-865-068-A (1) Obey the cold-weather maintenance procedure (Ref. AMM TASK 12-31-38-660-001).
(2) If the temperature in the aircraft is below 4 DEG.C (39.20 DEG.F), do the pre-conditioning procedure (Ref. AMM TASK 12-33-21-618-001).
E. Open, safety and tag this(these) circuit breaker(s):
Subtask 38-10-00-010-062-A ** ON A/C NOT FOR ALL | 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 | WATER SYSTEM-DEPRESS | 1MD | B02 |
| 2000VU | WATER SYSTEM-QANT-IND | 1MA | B01 |
| ** ON A/C NOT FOR ALL | |||
| 2000VU | LAV FWD-HOT WATER-A | 1MB | F02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-VACUUM-SYS | 35MG | A06 |
| 2001VU | WATER-SYSTEM-DEPRESS | 1MD | F03 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER SYS-QUANT-IND | 1MA | B06 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER SYS-AIR-COMPRESSOR | 19MD | F01 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAVATORY AFT-HOT WATER-D | 2MB | B02 |
| ** 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 | VACU TOIL SYS-LAV PWR-E | 34MG | A04 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-D | 39MG | A03 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-E | 9MB | B03 |
| ** ON A/C ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-A | 32MG | A01 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-VACU-SYS | 35MG | A06 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER-SYS-DRAIN | 1MP | B05 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-D | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-VACU-GEN | 33MG | A08 |
| ** 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 | VACU TOIL SYS-LAV PWR-G | 34MG | A04 |
| 2001VU | VACU TOIL SYS-LAV PWR-F | 39MG | A03 |
| 2001VU | VACU TOIL SYS-LAV PWR-D | 45MG | A02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER-SYSTEM-DEPRESS | 1MD | D05 |
| ** 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 | VACU TOIL SYS-LAV PWR-L | 45MG | A02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-L | 23MG | A05 |
| 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 | VACU TOIL SYS-LAV PWR-M | 34MG | A04 |
| 2001VU | LAV AFT-HOT WATER-M | 9MB | B03 |
F. Get Access
(1) Put an ACCESS PLATFORM 1M(3 FT) in position at Zone 133.
(2) Put an ACCESS PLATFORM 1M(3 FT) in position at Zone 171.
(3) Open service door 171AL and drain panel door 133AL.
(4) Connect the HOSE - VINYL to the drain connections at the potable-water drain panels.
Subtask 38-10-00-010-062-B ** ON A/C NOT FOR ALL (1) Put an ACCESS PLATFORM 1M(3 FT) in position at Zone 133.
(2) Put an ACCESS PLATFORM 1M(3 FT) in position at Zone 171.
(3) Open service door 171AL and drain panel door 133AL.
(4) Connect the HOSE - VINYL to the drain connections at the potable-water drain panels.
F. Get Access
(1) Put an ACCESS PLATFORM 1M(3 FT) in position at Zone 133.
(2) Put an ACCESS PLATFORM 1M(3 FT) in position at Zone 171.
(3) Open service door 171AL and drain panel doors 133AL and 192NB.
(4) Connect the HOSE - VINYL to the drain connections at the potable-water drain panels.
Subtask 38-10-00-860-052-A ** ON A/C NOT FOR ALL (1) Put an ACCESS PLATFORM 1M(3 FT) in position at Zone 133.
(2) Put an ACCESS PLATFORM 1M(3 FT) in position at Zone 171.
(3) Open service door 171AL and drain panel doors 133AL and 192NB.
(4) Connect the HOSE - VINYL to the drain connections at the potable-water drain panels.
G. Aircraft Maintenance Configuration
(2) Make sure that the switch on each water heater is set to the OFF position:
(a) If necessary, use the FLASHLIGHT and the MIRROR - INSPECTION, FLEXIBLE and find the power switch of the water heater.
(3) Make sure that the water faucets in the lavatories and the galleys are in the middle (mixed) position.
(4) Remove the water-faucet nozzle assemblies from the lavatories (Ref. AMM TASK 38-12-41-000-006) and do not install them at this time.
(5) Remove the equipment connected to the potable water system from each wet galley:
(a) 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).
(b) Remove the equipment you found. Refer to the related removal tasks for these components.
(c) If necessary, send the components to the workshop to do the disinfection of the removed components and clean them.
(6) Connect the HOSE - VINYL to the waste-water drain masts.
(7) At the Potable Water Service Panel (PWSP):
(a) Connect the drain line of the 98D38108005000 SUPP-POT_WATER,DISINF to the POTABLE-WATER OVERFLOW port on the PWSP.
(b) Connect the fill/drain line of the 98D38108005000 SUPP-POT_WATER,DISINF to the FILL/DRAIN port on the PWSP.
(c) Connect the CART - SERVICING, WATER, POTABLE or the WATER SOURCE - GROUND to the fill line of the 98D38108005000 SUPP-POT_WATER,DISINF.
(d) Put the CONTAINER 100 L(25 USGAL) below the drain line of the 98D38108005000 SUPP-POT_WATER,DISINF.
(8) Connect the CART - GROUND, NITROGEN to the ground air connection on the PWSP.
Subtask 38-10-00-860-052-B ** ON A/C NOT FOR ALL 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.
(1) Make sure that all the shutoff valves in the lavatories and the galleys are closed. (2) Make sure that the switch on each water heater is set to the OFF position:
(a) If necessary, use the FLASHLIGHT and the MIRROR - INSPECTION, FLEXIBLE and find the power switch of the water heater.
(3) Make sure that the water faucets in the lavatories and the galleys are in the middle (mixed) position.
(4) Remove the water-faucet nozzle assemblies from the lavatories (Ref. AMM TASK 38-12-41-000-006) and do not install them at this time.
(5) Remove the equipment connected to the potable water system from each wet galley:
(a) 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).
(b) Remove the equipment you found. Refer to the related removal tasks for these components.
(c) If necessary, send the components to the workshop to do the disinfection of the removed components and clean them.
(6) Connect the HOSE - VINYL to the waste-water drain masts.
(7) At the Potable Water Service Panel (PWSP):
(a) Connect the drain line of the 98D38108005000 SUPP-POT_WATER,DISINF to the POTABLE-WATER OVERFLOW port on the PWSP.
(b) Connect the fill/drain line of the 98D38108005000 SUPP-POT_WATER,DISINF to the FILL/DRAIN port on the PWSP.
(c) Connect the CART - SERVICING, WATER, POTABLE or the WATER SOURCE - GROUND to the fill line of the 98D38108005000 SUPP-POT_WATER,DISINF.
(d) Put the CONTAINER 100 L(25 USGAL) below the drain line of the 98D38108005000 SUPP-POT_WATER,DISINF.
(8) Connect the CART - GROUND, NITROGEN to the ground air connection on the PWSP.
G. Aircraft Maintenance Configuration
(2) Make sure that the switch on each water heater is set to the OFF position.
(3) Remove the water-faucet nozzle assemblies from the lavatories (Ref. AMM TASK 38-12-41-000-006) and do not install them at this time.
(4) Remove the equipment connected to the potable water system from each wet galley:
(a) 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).
(b) Remove the equipment you found. Refer to the related removal tasks for these components.
(c) If necessary, send the components to the workshop to do the disinfection of the removed components and clean them.
(5) Connect the HOSE - VINYL to the waste-water drain masts.
(6) At the Potable Water Service Panel (PWSP):
(a) Connect the drain line of the 98D38108005000 SUPP-POT_WATER,DISINF to the POTABLE-WATER OVERFLOW port on the PWSP.
(b) Connect the fill/drain line of the 98D38108005000 SUPP-POT_WATER,DISINF to the FILL/DRAIN port on the PWSP.
(c) Connect the CART - SERVICING, WATER, POTABLE or the WATER SOURCE - GROUND to the fill line of the 98D38108005000 SUPP-POT_WATER,DISINF.
(d) Put the CONTAINER 100 L(25 USGAL) below the drain line of the 98D38108005000 SUPP-POT_WATER,DISINF.
(7) Connect the CART - GROUND, NITROGEN to the ground air connection on the PWSP.
Subtask 38-10-00-560-061-A 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.
(1) Make sure that all the shutoff valves in the lavatories and the galleys are closed. (2) Make sure that the switch on each water heater is set to the OFF position.
(3) Remove the water-faucet nozzle assemblies from the lavatories (Ref. AMM TASK 38-12-41-000-006) and do not install them at this time.
(4) Remove the equipment connected to the potable water system from each wet galley:
(a) 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).
(b) Remove the equipment you found. Refer to the related removal tasks for these components.
(c) If necessary, send the components to the workshop to do the disinfection of the removed components and clean them.
(5) Connect the HOSE - VINYL to the waste-water drain masts.
(6) At the Potable Water Service Panel (PWSP):
(a) Connect the drain line of the 98D38108005000 SUPP-POT_WATER,DISINF to the POTABLE-WATER OVERFLOW port on the PWSP.
(b) Connect the fill/drain line of the 98D38108005000 SUPP-POT_WATER,DISINF to the FILL/DRAIN port on the PWSP.
(c) Connect the CART - SERVICING, WATER, POTABLE or the WATER SOURCE - GROUND to the fill line of the 98D38108005000 SUPP-POT_WATER,DISINF.
(d) Put the CONTAINER 100 L(25 USGAL) below the drain line of the 98D38108005000 SUPP-POT_WATER,DISINF.
(7) Connect the CART - GROUND, NITROGEN to the ground air connection on the PWSP.
H. Preparation of the Water Filters
(a) If installed, remove the caps and the filter elements from the galley filter housings. Do not install the new filter elements at this time.
(b) If removed, install the caps on the galley filter housings and tighten the clamps.
(c) If installed, remove the canister from the interface. Do not install a new canister at this time.
(d) Install the bypass connector to the interface and tighten it.
Subtask 38-10-00-941-057-A WARNING:
WHEN YOU DO THIS WORK, ALWAYS PUT ON PROTECTIVE GLOVES, GOGGLES AND PROTECTIVE CLOTHING TO PREVENT INJURY.
(1) Remove the galley water-filter elements (Ref. AMM TASK 38-12-23-920-802): (a) If installed, remove the caps and the filter elements from the galley filter housings. Do not install the new filter elements at this time.
(b) If removed, install the caps on the galley filter housings and tighten the clamps.
(c) If installed, remove the canister from the interface. Do not install a new canister at this time.
(d) Install the bypass connector to the interface and tighten it.
NOTE: The bypass connector is attached to the interface.
I. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to use the potable water system.
4. Procedure(1) Put the WARNING NOTICE(S) in position to tell persons not to use the potable water system.
Subtask 38-10-00-670-056-A ** ON A/C NOT FOR ALL
A. Disinfection of the Potable Water Tank and Distribution System
(a) Before you fill the potable water system, make sure that the potable water system is depressurized (Ref. AMM TASK 38-10-00-614-002).
(a) Turn the FILL OVERFLOW DRAIN handle from the NORMAL to the FILL position.
(b) Pull the FILL OVERFLOW DRAIN handle out to the mechanical stop.
(3) Fill the potable water system with the solution.
(4) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(5) On the PWSP:
(a) Push the FILL OVERFLOW DRAIN handle in.
(b) Turn the FILL OVERFLOW DRAIN handle from the FILL to the NORMAL position.
Subtask 38-10-00-670-056-B ** ON A/C NOT FOR ALL WARNING:
DO NOT GET THE WATER WITH THE DISINFECTANT SOLUTION ON YOUR SKIN OR IN YOUR EYES.
DO NOT LET WATER TOUCH SURFACES OTHER THAN THE WASH BASIN (WHEN THE NOZZLE ASSY IS NOT ON THE FAUCET, THE SOLUTION FLOWS OUT HORIZONTALLY).
TO DO THIS: - PUT ON PROTECTIVE CLOTHING
(1) Fill the potable water system with the solution: - PUT ON EYE PROTECTION OR GOGGLES
- PUT A GUARD AROUND THE WATER FAUCET OUTLET TO CAUSE SPRAY FROM THE SOLUTION TO FLOW INTO THE WASH BASIN (SPRAY FROM THE SOLUTION MUST NOT GO ON ADJACENT SURFACES).
(a) Before you fill the potable water system, make sure that the potable water system is depressurized (Ref. AMM TASK 38-10-00-614-002).
NOTE: If the potable water system is depressurized, the solution can flow out of the POTABLE WATER OVERFLOW port, when the potable water tank is filled.
(2) On the PWSP:(a) Turn the FILL OVERFLOW DRAIN handle from the NORMAL to the FILL position.
(b) Pull the FILL OVERFLOW DRAIN handle out to the mechanical stop.
(3) Fill the potable water system with the solution.
(4) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(5) On the PWSP:
(a) Push the FILL OVERFLOW DRAIN handle in.
(b) Turn the FILL OVERFLOW DRAIN handle from the FILL to the NORMAL position.
A. Disinfection of the Potable Water Tank and Distribution System
(a) Before you fill the potable water system, make sure that the potable water system is depressurized (Ref. AMM TASK 38-10-00-614-002).
(a) Turn the FILL/DRAIN handle from the NORMAL to the FILL position.
(b) Pull the FILL/DRAIN handle out to the mechanical stop.
(3) Turn the TANK OVERFLOW handle at panel 192NB from the CLOSE to the OPEN position.
(4) Fill the potable water system with the solution.
(5) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(6) Turn the TANK OVERFLOW handle from the OPEN to the CLOSE position.
(7) On the PWSP:
(a) Push the FILL/DRAIN handle in.
(b) Turn the FILL/DRAIN handle from the FILL to the NORMAL position.
Subtask 38-10-00-865-087-A WARNING:
DO NOT GET THE WATER WITH THE DISINFECTANT SOLUTION ON YOUR SKIN OR IN YOUR EYES.
DO NOT LET WATER TOUCH SURFACES OTHER THAN THE WASH BASIN (WHEN THE NOZZLE ASSY IS NOT ON THE FAUCET, THE SOLUTION FLOWS OUT HORIZONTALLY).
TO DO THIS: - PUT ON PROTECTIVE CLOTHING
(1) Fill the potable water system with the solution: - PUT ON EYE PROTECTION OR GOGGLES
- PUT A GUARD AROUND THE WATER FAUCET OUTLET TO CAUSE SPRAY FROM THE SOLUTION TO FLOW INTO THE WASH BASIN (SPRAY FROM THE SOLUTION MUST NOT GO ON ADJACENT SURFACES).
(a) Before you fill the potable water system, make sure that the potable water system is depressurized (Ref. AMM TASK 38-10-00-614-002).
NOTE: If the potable water system is depressurized, the solution can flow out of the POTABLE WATER OVERFLOW port, when the potable water tank is filled.
(2) On the PWSP:(a) Turn the FILL/DRAIN handle from the NORMAL to the FILL position.
(b) Pull the FILL/DRAIN handle out to the mechanical stop.
(3) Turn the TANK OVERFLOW handle at panel 192NB from the CLOSE to the OPEN position.
(4) Fill the potable water system with the solution.
(5) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(6) Turn the TANK OVERFLOW handle from the OPEN to the CLOSE position.
(7) On the PWSP:
(a) Push the FILL/DRAIN handle in.
(b) Turn the FILL/DRAIN handle from the FILL to the NORMAL position.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 38-10-00-670-084-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-E | 34MG | A04 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-D | 39MG | A03 |
| ** ON A/C ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-A | 32MG | A01 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-G | 34MG | A04 |
| 2001VU | VACU TOIL SYS-LAV PWR-F | 39MG | A03 |
| 2001VU | VACU TOIL SYS-LAV PWR-D | 45MG | A02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-L | 45MG | A02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-L | 23MG | A05 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-LAV PWR-M | 34MG | A04 |
C. Disinfection of the Potable-Water Distribution System
(2) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001) or (Ref. AMM TASK 38-10-00-614-003).
(a) In each lavatory, flush the toilet 15 times.
(b) In each lavatory, operate the water faucet for 3 minutes.
(c) In each galley, operate the water faucets at the sinks for 3 minutes.
(d) Close all the potable-water shutoff valves (this let the disinfection solution soak the two surfaces of the shutoff valves) and open the shutoff valves again.
(4) Depressurize the potable water system (Ref. AMM TASK 38-10-00-614-002).
(a) Turn the FILL OVERFLOW DRAIN handle from the NORMAL to the FILL position.
(b) Pull the FILL OVERFLOW DRAIN handle out to the mechanical stop.
(6) Fill the potable water system with the solution.
(7) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(8) On the PWSP:
(a) Push the FILL OVERFLOW DRAIN handle in.
(b) Turn the FILL OVERFLOW DRAIN handle from the FILL to the NORMAL position.
(9) Let the solution stay in the system for 1 hour.
(10) Do steps C.(1) to C.(9) again and let the solution stay in the system for 0.5 hour more.
(11) Disconnect the fill line of the 98D38108005000 SUPP-POT_WATER,DISINF from the potable-water service cart.
(12) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002).
Subtask 38-10-00-670-084-B ** ON A/C NOT FOR ALL WARNING:
DO NOT GET THE WATER WITH THE DISINFECTANT SOLUTION ON YOUR SKIN OR IN YOUR EYES.
DO NOT LET WATER TOUCH SURFACES OTHER THAN THE WASH BASIN (WHEN THE NOZZLE ASSY IS NOT ON THE FAUCET, THE SOLUTION FLOWS OUT HORIZONTALLY).
TO DO THIS: - PUT ON PROTECTIVE CLOTHING
(1) Open all the manual shutoff valves in the lavatories and the galleys. - PUT ON EYE PROTECTION OR GOGGLES
- PUT A GUARD AROUND THE WATER FAUCET OUTLET TO CAUSE SPRAY FROM THE SOLUTION TO FLOW INTO THE WASH BASIN (SPRAY FROM THE SOLUTION MUST NOT GO ON ADJACENT SURFACES).
(2) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001) or (Ref. AMM TASK 38-10-00-614-003).
NOTE: It is necessary to do this to make sure that all the lines and equipment (of the potable-water system) are filled with the disinfectant solution.
(3) Bleed the potable water system:(a) In each lavatory, flush the toilet 15 times.
(b) In each lavatory, operate the water faucet for 3 minutes.
(c) In each galley, operate the water faucets at the sinks for 3 minutes.
(d) Close all the potable-water shutoff valves (this let the disinfection solution soak the two surfaces of the shutoff valves) and open the shutoff valves again.
(4) Depressurize the potable water system (Ref. AMM TASK 38-10-00-614-002).
NOTE: If the potable water system is depressurized, the solution can flow out of the POTABLE-WATER OVERFLOW port, when the potable water tank is filled.
(5) On the PWSP:(a) Turn the FILL OVERFLOW DRAIN handle from the NORMAL to the FILL position.
(b) Pull the FILL OVERFLOW DRAIN handle out to the mechanical stop.
(6) Fill the potable water system with the solution.
(7) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(8) On the PWSP:
(a) Push the FILL OVERFLOW DRAIN handle in.
(b) Turn the FILL OVERFLOW DRAIN handle from the FILL to the NORMAL position.
(9) Let the solution stay in the system for 1 hour.
(10) Do steps C.(1) to C.(9) again and let the solution stay in the system for 0.5 hour more.
(11) Disconnect the fill line of the 98D38108005000 SUPP-POT_WATER,DISINF from the potable-water service cart.
(12) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002).
C. Disinfection of the Potable-Water Distribution System
(2) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001) or (Ref. AMM D/O 38-10-00-61).
(a) In each lavatory, flush the toilet 15 times.
(b) In each lavatory, operate the water faucet for 3 minutes.
(c) In each galley, operate the water faucets at the sinks for 3 minutes.
(d) Close all the potable-water shutoff valves (this let the disinfection solution soak the two surfaces of the shutoff valves) and open the shutoff valves again.
(4) Depressurize the potable water system (Ref. AMM TASK 38-10-00-614-002).
(a) Turn the FILL/DRAIN handle from the NORMAL to the FILL position.
(b) Pull the FILL/DRAIN handle out to the mechanical stop.
(6) Turn the TANK OVERFLOW handle at panel 192NB from the CLOSE to the OPEN position.
(7) Fill the potable water system with the solution.
(8) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(9) Turn the TANK OVERFLOW handle from the OPEN to the CLOSE position.
(10) On the PWSP:
(a) Push the FILL/DRAIN handle in.
(b) Turn the FILL/DRAIN handle from the FILL to the NORMAL position.
(11) Let the solution stay in the system for 1 hour.
(12) Do steps C.(1) to C.(9) again and let the solution stay in the system for 0.5 hour more.
(13) Disconnect the fill line of the 98D38108005000 SUPP-POT_WATER,DISINF from the potable-water service cart.
(14) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002).
Subtask 38-10-00-170-052-B WARNING:
DO NOT GET THE WATER WITH THE DISINFECTANT SOLUTION ON YOUR SKIN OR IN YOUR EYES.
DO NOT LET WATER TOUCH SURFACES OTHER THAN THE WASH BASIN (WHEN THE NOZZLE ASSY IS NOT ON THE FAUCET, THE SOLUTION FLOWS OUT HORIZONTALLY).
TO DO THIS: - PUT ON PROTECTIVE CLOTHING
(1) Open all the manual shutoff valves in the lavatories and the galleys. - PUT ON EYE PROTECTION OR GOGGLES
- PUT A GUARD AROUND THE WATER FAUCET OUTLET TO CAUSE SPRAY FROM THE SOLUTION TO FLOW INTO THE WASH BASIN (SPRAY FROM THE SOLUTION MUST NOT GO ON ADJACENT SURFACES).
(2) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001) or (Ref. AMM D/O 38-10-00-61).
NOTE: It is necessary to do this to make sure that all the lines and equipment (of the potable-water system) are filled with the disinfectant solution.
(3) Bleed the potable water system:(a) In each lavatory, flush the toilet 15 times.
(b) In each lavatory, operate the water faucet for 3 minutes.
(c) In each galley, operate the water faucets at the sinks for 3 minutes.
(d) Close all the potable-water shutoff valves (this let the disinfection solution soak the two surfaces of the shutoff valves) and open the shutoff valves again.
(4) Depressurize the potable water system (Ref. AMM TASK 38-10-00-614-002).
NOTE: If the potable water system is depressurized, the solution can flow out of the POTABLE-WATER OVERFLOW port, when the potable water tank is filled.
(5) On the PWSP:(a) Turn the FILL/DRAIN handle from the NORMAL to the FILL position.
(b) Pull the FILL/DRAIN handle out to the mechanical stop.
(6) Turn the TANK OVERFLOW handle at panel 192NB from the CLOSE to the OPEN position.
(7) Fill the potable water system with the solution.
(8) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(9) Turn the TANK OVERFLOW handle from the OPEN to the CLOSE position.
(10) On the PWSP:
(a) Push the FILL/DRAIN handle in.
(b) Turn the FILL/DRAIN handle from the FILL to the NORMAL position.
(11) Let the solution stay in the system for 1 hour.
(12) Do steps C.(1) to C.(9) again and let the solution stay in the system for 0.5 hour more.
(13) Disconnect the fill line of the 98D38108005000 SUPP-POT_WATER,DISINF from the potable-water service cart.
(14) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002).
D. Flush the Potable Water System (after disinfection with Calcium Hypochlorite or Sodium Hypochlorite)
(2) Fill the potable water system with clean water (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(3) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001) or (Ref. AMM TASK 38-10-00-614-003).
(4) Operate the water faucets in the lavatories and the galleys to flush them:
(a) In the lavatories:
1 Set the water faucet to the COLD position and fill the washbasin with water to the overflow level (approximately 3 l (0.79 USgal)).
2 Drain the washbasin fully.
3 Set the water faucet to the HOT position and fill the washbasin with water to the overflow level (approximately 3 l (0.79 USgal)).
4 Drain the washbasin fully.
5 Flush each toilet 15 times.
(b) In the galleys:
1 Operate the water faucets at the sink.
Subtask 38-10-00-670-058-A WARNING:
DO NOT GET THE WATER WITH THE DISINFECTANT SOLUTION ON YOUR SKIN OR IN YOUR EYES.
DO NOT LET WATER TOUCH SURFACES OTHER THAN THE WASH BASIN (WHEN THE NOZZLE ASSY IS NOT ON THE FAUCET, THE SOLUTION FLOWS OUT HORIZONTALLY).
TO DO THIS: - PUT ON PROTECTIVE CLOTHING
(1) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002). - PUT ON EYE PROTECTION OR GOGGLES
- PUT A GUARD AROUND THE WATER FAUCET OUTLET TO CAUSE SPRAY FROM THE SOLUTION TO FLOW INTO THE WASH BASIN (SPRAY FROM THE SOLUTION MUST NOT GO ON ADJACENT SURFACES).
(2) Fill the potable water system with clean water (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
(3) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001) or (Ref. AMM TASK 38-10-00-614-003).
(4) Operate the water faucets in the lavatories and the galleys to flush them:
(a) In the lavatories:
1 Set the water faucet to the COLD position and fill the washbasin with water to the overflow level (approximately 3 l (0.79 USgal)).
2 Drain the washbasin fully.
3 Set the water faucet to the HOT position and fill the washbasin with water to the overflow level (approximately 3 l (0.79 USgal)).
4 Drain the washbasin fully.
5 Flush each toilet 15 times.
(b) In the galleys:
1 Operate the water faucets at the sink.
E. Test for Remaining Disinfectant
(1) Examine the potable water in each galley and lavatory for remaining disinfectant. Do the test with Test Strips for Free Chlorine:
(a) Carefully let the water flow on the test strip at the water faucets in galleys and lavatories.
(2) If the test shows that there is remaining disinfectant that is more than the legal limits in the water, flush the system again. These limits are given by the national health authority for drinking water gives these limits.
5. Close-up(1) Examine the potable water in each galley and lavatory for remaining disinfectant. Do the test with Test Strips for Free Chlorine:
(a) Carefully let the water flow on the test strip at the water faucets in galleys and lavatories.
(2) If the test shows that there is remaining disinfectant that is more than the legal limits in the water, flush the system again. These limits are given by the national health authority for drinking water gives these limits.
Subtask 38-10-00-560-062-A
A. Installation of the Filter Elements and the Nozzle Assemblies (after disinfection of the potable water system with calcium hypochlorite or sodium hypochlorite)
(1) Stop the ground air supply.
(2) Install the galley water-filter elements (Ref. AMM TASK 38-12-23-920-802):
(a) If removed, install new filter elements in the related galley filter housings.
(b) If installed, remove the bypass connectors from the related interfaces.
(c) If removed, install new canisters to the related interfaces.
(d) Do a check for leaks.
Subtask 38-10-00-865-069-A (1) Stop the ground air supply.
(2) Install the galley water-filter elements (Ref. AMM TASK 38-12-23-920-802):
(a) If removed, install new filter elements in the related galley filter housings.
(b) If installed, remove the bypass connectors from the related interfaces.
(c) If removed, install new canisters to the related interfaces.
(d) Do a check for leaks.
NOTE: Leaks are not permitted.
(3) Install the water-faucet nozzle assemblies (Ref. AMM TASK 38-12-41-400-006). B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 38-10-00-613-070-A | 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 | WATER SYSTEM-DEPRESS | 1MD | B02 |
| 2000VU | WATER SYSTEM-QANT-IND | 1MA | B01 |
| ** ON A/C NOT FOR ALL | |||
| 2000VU | LAV FWD-HOT WATER-A | 1MB | F02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-VACUUM-SYS | 35MG | A06 |
| 2001VU | WATER-SYSTEM-DEPRESS | 1MD | F03 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER SYS-QUANT-IND | 1MA | B06 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER SYS-AIR-COMPRESSOR | 19MD | F01 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAVATORY AFT-HOT WATER-D | 2MB | B02 |
| ** 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 | LAV AFT-HOT WATER-E | 9MB | B03 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-VACU-SYS | 35MG | A06 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | WATER-SYS-DRAIN | 1MP | B05 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | LAV AFT-HOT WATER-D | 2MB | B02 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | VACU TOIL SYS-VACU-GEN | 33MG | A08 |
| ** 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 | WATER-SYSTEM-DEPRESS | 1MD | D05 |
| ** 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 |
C. Filling of the Potable Water System
(1) If necessary, fill the potable water system (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
Subtask 38-10-00-410-065-A ** ON A/C NOT FOR ALL (1) If necessary, fill the potable water system (Ref. AMM TASK 12-15-38-613-001) or (Ref. AMM TASK 12-15-38-613-002).
D. Close Access
(1) Disconnect the ground air-supply cart.
(2) Remove the container(s).
(3) Disconnect the 98D38108005000 SUPP-POT_WATER,DISINF from the FILL/DRAIN port and the POTABLE-WATER OVERFLOW port on the PWSP.
(4) Disconnect the hoses from the waste-water drain mast and the potable-water drain connection.
(5) In each wet galley:
(a) Install all equipment connected to the potable water system which you removed for cleaning in the shop. Refer to the related installation tasks for these components.
(6) Make sure that the work area is clean and clear of tools and other items.
(7) Make sure that the manual shutoff valve of the potable water system is open.
(8) Make sure that the switches on the water heaters in all lavatories are set to the ON position:
(a) If necessary, use a FLASHLIGHT and MIRROR - INSPECTION, FLEXIBLE to find the power switch of the water heater.
(9) Close service door 171AL and drain panel door 133AL.
(10) Remove the WARNING NOTICE(S).
(11) Remove the access platform(s).
Subtask 38-10-00-410-065-B ** ON A/C NOT FOR ALL (1) Disconnect the ground air-supply cart.
(2) Remove the container(s).
(3) Disconnect the 98D38108005000 SUPP-POT_WATER,DISINF from the FILL/DRAIN port and the POTABLE-WATER OVERFLOW port on the PWSP.
(4) Disconnect the hoses from the waste-water drain mast and the potable-water drain connection.
(5) In each wet galley:
(a) Install all equipment connected to the potable water system which you removed for cleaning in the shop. Refer to the related installation tasks for these components.
(6) Make sure that the work area is clean and clear of tools and other items.
(7) Make sure that the manual shutoff valve of the potable water system is open.
(8) Make sure that the switches on the water heaters in all lavatories are set to the ON position:
(a) If necessary, use a FLASHLIGHT and MIRROR - INSPECTION, FLEXIBLE to find the power switch of the water heater.
(9) Close service door 171AL and drain panel door 133AL.
(10) Remove the WARNING NOTICE(S).
(11) Remove the access platform(s).
D. Close Access
(1) Disconnect the ground air-supply cart.
(2) Remove the container(s).
(3) Disconnect the 98D38108005000 SUPP-POT_WATER,DISINF from the FILL/DRAIN port and the POTABLE-WATER OVERFLOW port on the PWSP.
(4) Disconnect the hoses from the waste-water drain mast and potable-water drain connections.
(5) In each wet galley:
(a) Install all equipment connected to the potable water system which you removed for cleaning in the shop. Refer to the related installation tasks for these components.
(6) Make sure that the work area is clean and clear of tools and other items.
(7) Make sure that the manual shutoff valve of the potable water system is open.
(8) Make sure that the switches on the water heaters in all lavatories are set to the ON position.
(9) Close drain panel doors 133AL and 192NB and service door 171AL.
(10) Remove the WARNING NOTICE(S).
(11) Remove the access platform(s).
Subtask 38-10-00-942-057-A (1) Disconnect the ground air-supply cart.
(2) Remove the container(s).
(3) Disconnect the 98D38108005000 SUPP-POT_WATER,DISINF from the FILL/DRAIN port and the POTABLE-WATER OVERFLOW port on the PWSP.
(4) Disconnect the hoses from the waste-water drain mast and potable-water drain connections.
(5) In each wet galley:
(a) Install all equipment connected to the potable water system which you removed for cleaning in the shop. Refer to the related installation tasks for these components.
(6) Make sure that the work area is clean and clear of tools and other items.
(7) Make sure that the manual shutoff valve of the potable water system is open.
(8) Make sure that the switches on the water heaters in all lavatories are set to the ON position.
(9) Close drain panel doors 133AL and 192NB and service door 171AL.
(10) Remove the WARNING NOTICE(S).
(11) Remove the access platform(s).
E. Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) To discard the used disinfection solution, refer to the national or local authority regulations.
Subtask 38-10-00-862-062-A (1) To discard the used disinfection solution, refer to the national or local authority regulations.