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

TASK 38-10-00-670-006-A
Disinfection of the Water Tank and Distribution System with Hydrogen Peroxide (H2O2) HERLISIL or H BIO T50 or SANOSIL with the Water Disinfection Doser

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	CONTAINER 30 L(8 USGAL)
No specific	1	GROUND AIR-SUPPLY UNIT(LOW PRESSURE)
No specific	2	HOSE - VINYL
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98F38108656000	1	DOSER-WATER DISINFECTION

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
Water Disinfection Doser

3. Job Set-up
Subtask 38-10-00-861-061-A

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

Subtask 38-10-00-680-054-A

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

Subtask 38-10-00-618-054-A

C. 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 38-10-00-865-074-A

D. 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 38-10-00-010-065-A ** ON A/C NOT FOR ALL

E. 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 38-10-00-010-065-B ** ON A/C NOT FOR ALL

E. 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 38-10-00-860-055-A ** ON A/C NOT FOR ALL

F. 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.

WARNING: WHEN YOU DO THIS WORK, ALWAYS PUT ON PROTECTIVE GLOVES, GOGGLES AND PROTECTIVE CLOTHING TO PREVENT INJURY.

(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) 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 GROUND AIR-SUPPLY UNIT(LOW PRESSURE) to the ground air connection on the Potable Water Service Panel (PWSP).

Subtask 38-10-00-860-055-C ** ON A/C NOT FOR ALL

F. 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.

WARNING: WHEN YOU DO THIS WORK, ALWAYS PUT ON PROTECTIVE GLOVES, GOGGLES AND PROTECTIVE CLOTHING TO PREVENT INJURY.

Subtask 38-10-00-560-070-A

G. 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 38-10-00-480-051-A

H. Installation of the 98F38108656000 DOSER-WATER DISINFECTION

NOTE: The Doser-Water Disinfection can only be used with a disinfection solution of 50% H2O2.

(1) Prepare the water disinfection doser.
(2) Before you use the water disinfection doser make sure that it is:
(a) Correctly calibrated, clean and disinfected (refer to the manufacturer's instructions).
(3) Put the disinfection tool in position at PWSP 2023VU.
(4) Connect the water supply hose to the inlet of the water disinfection doser.

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.

(5) Put the outlet hose of the water disinfection doser into a CONTAINER 30 L(8 USGAL).
(6) Put the small chemical tube into the container with the disinfection solution of Disinfectant-Potable Water System Hydrogen Peroxide - (Material No.11AKC1) .
(7) At the 98F38108656000 DOSER-WATER DISINFECTION:

CAUTION: MAKE SURE THAT THE WATER PRESSURE IS NOT MORE THAN 3.45 BARS (50.0 PSI). IF THE WATER PRESSURE IS MORE THAN 3.45 BARS (50.0 PSI), DAMAGE TO EQUIPMENT CAN OCCUR.

(a) Adjust the water pressure to between 3.0 bar (43.5113 psi) and 3.45 bar (50.0380 psi).
(b) For a sodium hydrogen peroxide solution with 50 percent Hydrogen peroxide:

Adjust the proportional doser to a value of 0.09 percent.

(c) Turn the inlet valve (membrane valve) a small distance to open it, but do not fully open it at this time.
(8) Bleed the Water Disinfection Doser:
(a) Push the bleed button on the top of the doser unit to bleed the system.
(b) Keep the bleed button pushed until no air but only water comes from the bleed button.
(c) Release the bleed button.
(9) Open the outlet valve of the water disinfection doser.
(10) Slowly open the inlet valve (membrane valve) until it is fully open (the water disinfection doser is self-priming).
(11) Operate the water disinfection doser until the disinfectant starts to flow into the doser unit without air bubbles in the plastic tube.

NOTE: You can see the disinfectant flow through the plastic tube.
A "click clack" noise is typical for the DOSATRON unit when it is in operation.

(12) Operate the water disinfection doser for 2 - 3 min and let approximately 20. l (5.2834 USgal) of disinfection solution flow into the container.
(13) Close the outlet valve of the water disinfection doser.

Subtask 38-10-00-941-060-A

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

4. Procedure
Subtask 38-10-00-670-067-A ** ON A/C NOT FOR ALL

A. Disinfection of the Potable-Water Distribution System
(1) Connect the outlet hose of the 98F38108656000 DOSER-WATER DISINFECTION to the fill port at the potable water system.
(2) Fill the potable-water system with the solution:
(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.

(b) On the PWSP, turn and pull the FILL OVERFLOW DRAIN handle from the NORMAL to the FILL position.
(c) Fill the potable water system with the solution:
1 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).
(d) Set the FILL OVERFLOW DRAIN handle to the NORMAL position.
(e) Stop the 98F38108656000 DOSER-WATER DISINFECTION, but do not disconnect it from the aircraft system at this time.

Subtask 38-10-00-670-067-B ** ON A/C NOT FOR ALL

A. Disinfection of the Potable-Water Distribution System
(1) Connect the outlet hose of the 98F38108656000 DOSER-WATER DISINFECTION to the fill port at the potable water.
(2) Fill the potable-water system with the solution:
(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.

(b) On the PWSP, turn and pull the FILL/DRAIN handle from the NORMAL to the FILL position.
(c) On the potable-water drain panel, turn the OVERFLOW handle to the OVERFLOW position.
(d) Fill the potable water system with the solution:
1 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).
(e) Set the FILL OVERFLOW DRAIN handle to the NORMAL position.
(f) Stop the 98F38108656000 DOSER-WATER DISINFECTION, but do not disconnect it from the aircraft system at this time.

Subtask 38-10-00-865-075-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	WATER SYSTEM-DEPRESS	1MD	B02
** ON A/C NOT FOR ALL
2001VU	WATER-SYSTEM-DEPRESS	1MD	F03
** 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	WATER-SYSTEM-DEPRESS	1MD	D05
** 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 38-10-00-670-068-B

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

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) 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) 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 each toilet 15 times.
(4) In the galleys:
(a) Operate the water faucets at the sinks.
(b) From each potable water connection, let 5 l (1.3 USgal) of water flow through the sink.
(c) Close all the manual shutoff valves in the galleys and lavatories first, then close the fill and drain valves (this lets the disinfection solution soak on the two faces of the shutoff valves).
(d) Open the shutoff valves again.
(5) 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.

(6) Fill the potable water system again manually with disinfectant solution until it flows out of the POTABLE WATER OVERFLOW port (Ref. AMM TASK 12-15-38-613-002).

NOTE: This is to make sure that the system is full.

(7) Let the disinfectant solution stay in the system for 1 hour.
(8) Do step C.(1) to (6) again and let the solution stay in the system for another 0.5 hour more.

Subtask 38-10-00-080-051-A

D. Remove the Water Disinfection Doser.

Subtask 38-10-00-170-055-B

E. Flush the Potable Water System after Disinfection
(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 (0.8 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 (0.8 USgal)).
4 Drain the washbasin fully.
5 Flush each toilet 15 times.
(b) In the galleys:
1 Operate the water faucets at the sinks.
2 From each potable water connection, let 5 l (1.3 USgal) of water flow through the sink.

Subtask 38-10-00-670-069-A

F. 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 it is necessary to flush the system three times.

5. Close-up
Subtask 38-10-00-560-071-A

A. Installation of the Filter Elements
(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 the leak check.

Subtask 38-10-00-865-090-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 38-10-00-613-062-A

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

Subtask 38-10-00-410-068-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 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 shut-off 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.
(7) Close service door 171AL and drain panel door 133AL.
(8) Remove the warning notice(s).

Subtask 38-10-00-410-068-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 connections.
(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 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 shut-off 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.
(7) Close drain panel doors 133AL and 192NB and service door 171AL.
(8) Remove the warning notice(s).

Subtask 38-10-00-942-060-A

E. Removal of the Ground Support Equipment
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(2) To discard the used disinfection solution, refer to the national or local authority regulations.

Subtask 38-10-00-862-060-A

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

[Rev.10 from 2021] 2026.04.01 01:17:42 UTC