Removal of the Drain Valve (Air Stop Valve) in the Lavatories

TASK 38-32-41-000-001-A
Removal of the Drain Valve (Air Stop Valve) in the Lavatories

WARNING: ALWAYS USE RUBBER GLOVES WHEN YOU DO WORK:

ON THE TOILET WASTE SYSTEM, OR
ON PARTS THAT HAVE CONTAMINATION FROM THE WASTE SYSTEM.

WHEN YOU COMPLETE THE WORK PROCEDURE, CLEAN YOUR HANDS WITH SOAP AND WATER. THIS WILL PREVENT INFECTION (TOILET WASTE IS DANGEROUS FOR HEALTH).

WARNING: DO NOT DO WORK ON THE TOILET WASTE SYSTEM AND THE POTABLE WATER SYSTEM AT THE SAME TIME. THIS WILL PREVENT CONTAMINATION OF THE POTABLE WATER SYSTEM. SUCH CONTAMINATION CAN BE DANGEROUS TO HEALTH.

NOTE: The procedure for the removal of all the drain valves in the lavatories is the same.

ZONE: 260

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	CONTAINER 3 L(3/4 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
260	AFT CABIN UTILITY AREA

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 38-30-00-510-001-A	Decontamination of Components of the Waste/Water and Toilet System for Shipping and/or Installation
Drain Valve ** ON A/C NOT FOR ALL
Drain Valve ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 38-32-41-861-050-A

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

Subtask 38-32-41-865-052-A

B. 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	LAV FWD-HOT WATER-A	1MB	F02
** ON A/C NOT FOR ALL
2001VU	LAVATORY AFT-HOT WATER-D	2MB	B02
** ON A/C NOT FOR ALL
2001VU	LAV AFT-HOT WATER-E	9MB	B03
** ON A/C NOT FOR ALL
2001VU	LAV AFT-HOT WATER-D	2MB	B02
** 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	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 38-32-41-010-051-B ** ON A/C NOT FOR ALL

C. Get Access

Drain Valve ** ON A/C NOT FOR ALL

(1) Get access to the passenger cabin.
(2) Open the lavatory door.
(3) Open access panel to the potable water shut off valve.
(4) Close the shut off valve (7).

Subtask 38-32-41-010-051-R ** ON A/C NOT FOR ALL

C. Get Access

Drain Valve ** ON A/C NOT FOR ALL

(1) Get access to the passenger cabin.
(2) Open the related lavatory door.
(3) Open the access door of the related potable-water shutoff valve (8).
(4) Turn the control handle to close the related potable-water shutoff valve (8).
(5) Put the WARNING NOTICE(S) in position to tell persons not to open the potable-water shutoff valve (8).

4. Procedure
Subtask 38-32-41-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Drain Valve 4251MM
(1) Put a CONTAINER 3 L(3/4 USGAL) below the drain valve to collect the water.
(2) Loosen the clamps (1) at the top and the bottom of the drain valve.
(3) Disconnect the hoses (2) and (6).
(4) Remove the screws (3) and the washers (4).
(5) Remove the drain valve (5).
(6) Put the PLUG-BLANKING in each disconnected line end.
(7) If you send the drain valve to the repair shop, make sure that it is sterilized (Ref. AMM TASK 38-30-00-510-001).
(8) If you use removed parts again, clean and disinfect them (Ref. AMM TASK 38-30-00-510-001).

Subtask 38-32-41-020-050-D ** ON A/C NOT FOR ALL

A. Removal of the Drain Valve
(1) Put a CONTAINER 3 L(3/4 USGAL) below the drain valve (6) to collect the water.
(2) Loosen the screws of the clamps (4) and remove the clamps (4).
(3) Disconnect the hoses (5) and (7) from the drain valve (6).
(4) Put the PLUG-BLANKING in each disconnected line end.
(5) Remove the nuts (3).
(6) Remove the screws (1) and the washers (2).
(7) Remove the drain valve (6).
(8) If you send the drain valve (6) to the workshop, make sure that it is clean (Ref. AMM TASK 38-30-00-510-001).
(9) If you use the removed parts again, use disinfectant to clean them (Ref. AMM TASK 38-30-00-510-001).

[Rev.10 from 2021] 2026.04.02 07:19:39 UTC