Disinfection of the Water Tank and Distribution System with Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL

TASK 38-10-00-670-004-A
Disinfection of the Water Tank and Distribution System with Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL

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: AFTER THE DISINFECTION PROCEDURE, REMOVE ALL USED PROTECTIVE PAPER AND/OR CLOTH RAGS AND DISCARD THEM IMMEDIATELY. TO KNOW HOW TO DO THIS SAFELY, REFER TO THE MATERIAL MANUFACTURER'S INSTRUCTIONS. IF HYDROGEN PEROXIDE SOLUTION DRIES ONTO ORGANIC MATERIALS SUCH AS PAPER OR CLOTH, THESE MATERIALS CAN SUDDENLY START TO BURN.

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 Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	AIR SOURCE 6.9 BAR (100 PSI) - REGULATED,FILTERED, DRY
No specific	1	CART - DISINFECTION, WATER
No specific	1	CART - SERVICING, WATER, POTABLE
No specific	2	FLASHLIGHT
No specific	2	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

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.11AKC1)	Disinfectant-Potable Water System Hydrogen Peroxide -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
133AL, 171AL
192NB

D. Referenced Information

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 12-31-38-660-001-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 25-35-00-00	GALLEY EQUIPMENT - DESCRIPTION AND OPERATION

3. Job Set-up
Subtask 38-10-00-861-059-A

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 38-10-00-680-052-A

B. Drain the potable water system (Ref. AMM TASK 12-24-38-680-001).

Subtask 38-10-00-560-063-A

C. Preparation of the Disinfectant Solution with Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL - for 50% H202 concentration

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:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

(1) Use the Disinfectant-Potable Water System Hydrogen Peroxide - (Material No.11AKC1) for the disinfection of the potable water system as given in Table 1.

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.

Table 1

A/C Type	Number of Tanks	Usable tank volume in l (USgal)	Volume of water needed for disinfection solution in l (USgal) *	Pure H202 in ml (fl oz) **	Disinfectant for 50% H202 concentration in l (Usgal) ***
A318,A319 A320,A321	1	200 (53)	250 (66)	125 (4.3)	0.25 (0.07)

NOTE: Refer to table 1
* The given volume includes the volume of the potable water tank and the distribution system.
** The weight is calculated for pure hydrogen peroxide (H2O2).
*** The value is for liquid disinfectant which contains approximately 50% active hydrogen peroxide in l (USgal).
It is necessary to obey the manufacturer's instructions when you use these products.

NOTE: If you think that there is a large amount of contamination in the potable water system:

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.

Subtask 38-10-00-560-072-A

D. Preparation of the Disinfectant Solution with Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL - for 3% H2O2 Concentration

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:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

(1) Use Disinfectant-Potable Water System Hydrogen Peroxide - (Material No.11AKC1) and clean the potable water system (refer to table 2).

NOTE: Airbus recommends that:

You use the water from the cold water tap to clean the potable water system.
You do not keep the water or the disinfectant solution in a very cold or very hot condition before you do the cleaning procedure.

Table 2

A/C Type	Number of Tanks	Usable tank volume in l (US gal)	Volume of water necessary for disinfectant solution in l (US gal) *	Pure H2O2 in ml (fl oz) **	Disinfectant for 3% H2O2 concentration in l (US gal) ***
A318,A319 A320,A321	1	200 (53)	250 (66)	125 (4.3)	4.17 (1.1)

NOTE: In table 2:

The "*" identifies the given volume that includes the volume of the potable water tank and the distribution system.
The "**" identifies the weight that is calculated for the pure hydrogen peroxide (H2O2).
The "***" identifies the value of the liquid disinfectant which contains approximately 3% of hydrogen peroxide in l (US gal).

(2) Obey the manufacturer's instructions when you use these disinfectant materials.
(3) If there is a higher contamination in the potable water system:
(a) Let the disinfectant solution flow through all the water faucets in the lavatories and the galleys.
(b) Make sure that the potable water system is fully clean.

Subtask 38-10-00-618-052-A

E. Preparation for 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 38-10-00-865-070-A

F. Open, safety and tag this(these) circuit breaker(s):

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

Subtask 38-10-00-010-063-A ** ON A/C NOT FOR ALL

G. 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 connection at the potable-water drain panel.

Subtask 38-10-00-010-063-B ** ON A/C NOT FOR ALL

G. 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 38-10-00-860-053-A ** ON A/C NOT FOR ALL

H. Aircraft Maintenance Configuration

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 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) Connect the AIR SOURCE 6.9 BAR (100 PSI) - REGULATED,FILTERED, DRY to the ground air connection on the Potable Water Service Panel (PWSP).

Subtask 38-10-00-860-053-C ** ON A/C NOT FOR ALL

H. Aircraft Maintenance Configuration

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 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.
(4) Connect the HOSE - VINYL to the waste-water drain masts.
(5) Connect the AIR SOURCE 6.9 BAR (100 PSI) - REGULATED,FILTERED, DRY to the ground air connection on the Potable Water Service Panel (PWSP).

Subtask 38-10-00-560-064-A

I. Preparation of the Water Filters

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.

Subtask 38-10-00-941-058-A

J. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to use the potable water system.

4. Procedure
Subtask 38-10-00-670-059-A ** ON A/C NOT FOR ALL

A. Disinfection of the Potable-Water Distribution System

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

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).

(1) Make sure that you did the depressurization of the potable water system (Ref. AMM TASK 38-10-00-614-002).

NOTE: If you release the pressure of the potable water system, the solution can flow out of the POTABLE WATER OVERFLOW port when you fill the potable water tank.

(2) On the PWSP, turn and pull the FILL OVERFLOW DRAIN handle from the NORMAL to the FILL position.
(3) Fill the potable water system:
(a) Connect the CART - SERVICING, WATER, POTABLE or the WATER SOURCE - GROUND to the fill port at the PWSP.
(b) Fill the potable water tank with approximately 50 percent of water (Ref. AMM TASK 12-15-38-613-002).
(c) Disconnect the CART - SERVICING, WATER, POTABLE and connect the CART - DISINFECTION, WATER to the fill port of the potable water.
(d) Fill the potable water tank with the solution.

NOTE: The quantity of the solution is given in table 1 and table 2.

(e) Disconnect the disinfection cart and connect the CART - SERVICING, WATER, POTABLE again.
(f) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-002).
(g) Stop the operation of the CART - SERVICING, WATER, POTABLE.
(4) Set the FILL OVERFLOW DRAIN handle to the NORMAL position.
(5) Let the disinfectant solution stay in the system for 1 hour.

Subtask 38-10-00-670-059-B ** ON A/C NOT FOR ALL

A. Disinfection of the Potable-Water Distribution System

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).

(1) Make sure that you did the depressurization of the potable water system (Ref. AMM TASK 38-10-00-614-002).

NOTE: If you release the pressure of the potable water system, the solution can flow out of the POTABLE WATER OVERFLOW port when you fill the potable water tank.

(2) On the PWSP, turn and pull the FILL/DRAIN handle from the NORMAL to the FILL position.
(3) Move the TANK OVERFLOW handle at drain panel 192NB from the CLOSE to the OPEN position.
(4) Fill the potable water system:
(a) Connect the CART - SERVICING, WATER, POTABLE or the WATER SOURCE - GROUND to the fill port at the PWSP.
(b) Fill the potable water tank with approximately 50 percent of water (Ref. AMM TASK 12-15-38-613-002).
(c) Disconnect the CART - SERVICING, WATER, POTABLE and connect the CART - DISINFECTION, WATER to the fill port of the potable water.
(d) Fill the potable water tank with the solution.

NOTE: The quantity of the solution is given in table 1 and table 2.

(e) Disconnect the disinfection cart and connect the CART - SERVICING, WATER, POTABLE again.
(f) Fill the potable water tank with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-002).
(g) Stop the operation of the CART - SERVICING, WATER, POTABLE.
(5) Set the TANK OVERFLOW handle to the CLOSE position.
(6) Set the FILL/DRAIN handle to the NORMAL position.
(7) Let the disinfectant solution stay in the system for 1 hour.

Subtask 38-10-00-865-071-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

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

Subtask 38-10-00-670-060-A ** ON A/C NOT FOR ALL

C. Disinfection of the Potable-Water Distribution System with Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL

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).

(1) Open all the manual shutoff valves in the lavatories and the galleys.
(2) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001) or (Ref. AMM D/O 38-10-00-61).
(3) Make sure that all the lines and equipment of the potable water system are filled with the disinfectant solution.
(4) In the lavatories:
(a) Set each water faucet to the COLD position and fill the washbasin with water (approximately 3 l (0.79 USgal)) until it flows down the overflow vent.
(b) Drain the washbasin fully.
(c) Set each water faucet to the HOT position and fill the washbasin with water (approximately 3 l (0.79 USgal)) until it flows down the overflow vent.
(d) Drain the washbasin fully.
(e) Flush the toilet 15 times.
(5) In the galleys:
(a) Operate the water faucets.
(b) From each potable water connection, let 5 l (1.3 USgal) of water flow through the sink.
(6) Close all the manual shutoff valves in the galleys and the lavatories (this lets the disinfection solution soak on the two faces of the shutoff valves).
(7) Do the depressurization of the potable water system (Ref. AMM TASK 38-10-00-614-002).
(8) Let the disinfectant solution stay in the system for 1 hour.
(9) Flush the potable water system:
(a) Open the manual shutoff valves in the galleys and the lavatories.
(b) Flush the potable water system, start at the rear of the cabin and stop at the front.
(10) On the PWSP, turn and pull the FILL/DRAIN handle from the NORMAL to the FILL position.
(11) Move the TANK OVERFLOW handle at drain panel 192NB from the CLOSE to the OPEN position.
(12) Fill the potable water system manually (without electrical power) again with water until the solution flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-002).
(13) Make sure that the potable water system is full.
(14) Do steps (2) thru (7) again.
(15) Let the disinfectant stay in the system for 0.5 hours.
(16) Open the manual shutoff valves again.
(17) Disconnect and remove the CART - SERVICING, WATER, POTABLE or the WATER SOURCE - GROUND.

Subtask 38-10-00-670-060-B ** ON A/C NOT FOR ALL

C. Disinfection of the Potable-Water Distribution System with Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL

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).

(1) Open all the manual shutoff valves in the lavatories and the galleys.
(2) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001) or (Ref. AMM TASK 38-10-00-614-003).
(3) Make sure that all the lines and equipment of the potable water system are filled with the disinfectant solution.
(4) In the lavatories:
(a) Set the water faucet to the COLD position and fill the washbasin with water (approximately 3 l (0.79 USgal)) until it flows down the overflow vent.
(b) Drain the washbasin fully.
(c) Set the water faucet to the HOT position and fill the washbasin with water (approximately 3 l (0.79 USgal)) until it flows down the overflow vent.
(d) Drain the washbasin fully.
(e) Flush the toilet 15 times.
(5) In the galleys:
(a) Operate the water faucets.
(b) From each potable water connection, let 5 l (1.3 USgal) of water flow through the sink.
(6) Close all the manual shutoff valves in the galleys and the lavatories (this lets the disinfection solution soak on the two faces of the shutoff valves).
(7) Do the depressurization of the potable water system (Ref. AMM TASK 38-10-00-614-002).
(8) Let the disinfectant solution stay in the system for 1 hour.
(9) Flush the potable water system:
(a) Open the manual shutoff valves in the galleys and the lavatories.
(b) Flush the potable water system, start at the rear of the cabin and stop at the front.
(10) On the PWSP, turn and pull the FILL/DRAIN handle from the NORMAL to the FILL position.
(11) Fill the potable water system manually (without electrical power) again with water until the solution flows out of the POTABLE WATER OVERFLOW PORT (Ref. AMM TASK 12-15-38-613-002).
(12) Make sure that the potable water system is full.
(13) Do steps (2) thru (7) again.
(14) Let the disinfectant stay in the system for 0.5 hours.
(15) Open the manual shutoff valves again.
(16) Disconnect and remove the CART - SERVICING, WATER, POTABLE or the WATER SOURCE - GROUND.

Subtask 38-10-00-170-053-B

D. Flush the Potable Water System (after Disinfection with Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL)
(1) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001).
(2) Fill the potable water system with clean water (Ref. AMM TASK 12-15-38-613-001).
(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 faucet 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 toilets 15 times.
(b) In the galleys:
1 Operate the water faucets at the sink.
2 From each potable water connection, let 5 l (1.3 USgal) of water flow through the sink.

Subtask 38-10-00-670-061-A

E. Rest Disinfectant (after Disinfection with Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL)
(1) Make sure that you have flushed the potable water system 3 times minimum.
This is necessary to make sure that there is no rest disinfectant in the system.

NOTE: There is no test for remaining disinfectant when Herlisil or H BIO T50 or SANOSIL is used. That is the cause why you must flush the system three times.

5. Close-up
Subtask 38-10-00-560-065-A

A. Installation of the Filter Elements (Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL)
(1) Stop the ground air supply.
(2) Install the galley water-filter elements (Ref. AMM TASK 38-12-23-920-802):
(a) If the filter elements are removed, install the new filter elements in the related galley filter housings.
(b) If the bypass connectors are installed on the related interfaces, remove them.

CAUTION: FLUSH THE POTABLE-WATER FILTER CANISTER WITH A MINIMUM OF 5 L OF WATER. THIS IS NECESSARY TO REMOVE CARBON PARTICLES, WHICH CAN CAUSE A MALFUNCTION OF THE POTABLE-WATER FILTER CANISTER.

Subtask 38-10-00-865-088-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

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

Subtask 38-10-00-613-060-A

C. If necessary, fill the potable water system (Ref. AMM TASK 12-15-38-613-001).

Subtask 38-10-00-410-066-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Disconnect the ground air-supply cart.
(2) Disconnect the hoses from the waste water drain mast and the potable water drain connection.
(3) 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 of these components.
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Make sure that the manual shutoff valve of the potable water system is open.
(6) 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 find the power switch of the water heater.
(7) Close service door 171AL and drain panel door 133AL.
(8) Remove the WARNING NOTICE(S).

Subtask 38-10-00-410-066-B ** ON A/C NOT FOR ALL

D. Close Access
(1) Disconnect the ground air-supply cart.
(2) Disconnect the hoses from the waste-water drain mast and potable-water drain connection.
(3) In each wet galley:
(a) Install all the equipment connected to the potable water system which you removed to clean in the shop. Refer to the related installation tasks for these components.
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Make sure that the manual shutoff valve of the potable water system is open.
(6) Make sure that the switches on the water heaters in all the lavatories are set to the ON position.
(7) Close drain panel doors 133AL and 192NB and service door 171AL.
(8) Remove the WARNING NOTICE(S).

Subtask 38-10-00-942-058-A

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 38-10-00-862-064-A

F. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 01:17:40 UTC