Operational Test of the Waste/Water Drain System

TASK 38-32-00-710-002-A
Operational Test of the Waste/Water Drain System

ZONE: 130
ZONE: 150
ZONE: 170
ZONE: 220
ZONE: 250
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	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	AR	CONTAINER 20L (5 USGAL)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	VALVE - SHUT OFF
98D38108002000	AR	ADAPTER DRAIN MAST

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
130	FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
170	AFT CAB U/FLOOR COMPT AFT BHD OF BULK
220	FWD CAB UTILITY AREAS
250	AFT PASSENGER COMPARTMENT
260	AFT CABIN UTILITY AREA

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-15-38-613-001-A	Fill the Potable Water Tank System (Aircraft Electrical Power Available)
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 25-41-00-00	FORWARD LAVATORIES - DESCRIPTION AND OPERATION
TASK 25-43-00-00	AFT LAVATORIES - DESCRIPTION AND OPERATION

3. Job Set-up
Subtask 38-32-00-861-051-A

A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 38-32-00-010-050-A

B. Get Access
(1) Open the applicable lavatory door (Ref. AMM D/O 25-41-00-00) or (Ref. AMM D/O 25-43-00-00).

Subtask 38-32-00-865-054-A

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	WATER SYSTEM-QANT-IND	1MA	B01
** ON A/C NOT FOR ALL
2001VU	WATER SYS-QUANT-IND	1MA	B06
** ON A/C NOT FOR ALL
2001VU	WATER SYS-DRAIN	1MP	B05
** ON A/C NOT FOR ALL
2001VU	WATER-SYS-DRAIN	1MP	B05

Subtask 38-32-00-865-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	WASTE WIP-DRAINMAST-FWD	1DU	B06
** ON A/C NOT FOR ALL
2000VU	DRAINMAST-FWD	1DU	B03
** ON A/C NOT FOR ALL
2000VU	WASTE WIP-DRAINMAST-FWD	1DU	B03
** ON A/C ALL
2001VU	WASTE WIP-DRAINMAST-AFT	11DU	E01
** ON A/C NOT FOR ALL
2001VU	WASTE WIP-DRAINMAST-MID	21DU	E02

Subtask 38-32-00-860-054-A

E. Preparation for the Test
(1) Fill the potable water system (Ref. AMM TASK 12-15-38-613-001).
(2) If you do work on the aft drain mast, put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in the correct position.
(3) Install a hose with a VALVE - SHUT OFF in the related drain mast.

NOTE: You can use an 98D38108002000 ADAPTER DRAIN MAST as an alternative to the VALVE - SHUT OFF.

(4) Put the open end of the hose in a CONTAINER 20L (5 USGAL).
(5) Close the shutoff valve assembly at the drain mast.

4. Procedure
Subtask 38-32-00-710-051-A ** ON A/C NOT FOR ALL

A. Do this test:

NOTE: This procedure is applicable only for the drain assembly that has a stopper.

ACTION	RESULT
1.In the lavatory: Operate the water faucet.	In the lavatory: The water flows into the washbasin.
2.At the drain mast: Open the shutoff valve assembly.	At the drain mast: The water drains from the drain valve.
3.At the drain mast: Close the shutoff valve assembly.
4.In the lavatory: Put the stopper in the washbasin to prevent the flow of water into the drain assembly. Operate the water faucet until the washbasin is full. Make a mark to identify the level of water.
5.In the lavatory: Examine the water level after 5 minutes.	In the lavatory: The water level in the washbasin does not change.
6.In the lavatory: Remove the stopper from the washbasin to drain the water. Let the water drain.	In the lavatory: The water drains from the washbasin. The drain lines are filled.
7.In the lavatory: Make a mark to identify the new level of water. Examine the water level after 5 minutes.	In the lavatory: The water level does not change.
8.At the drain mast: Open the shutoff valve assembly. Examine the rate of the water flow from the drain mast.	In the lavatory: The water drains from the washbasin.

Subtask 38-32-00-710-051-B ** ON A/C NOT FOR ALL

A. Do this test:

NOTE: This procedure is applicable only for the drain assembly that has a drain plug.

ACTION	RESULT
1.In the lavatory: Operate the water faucet.	In the lavatory: The water flows into the washbasin.
2.At the drain mast: Open the shutoff valve assembly.	At the drain mast: The water drains from the drain valve.
3.At the drain mast: Close the shutoff valve assembly.
4.In the lavatory: Push the drain plug in the washbasin to prevent the flow of water into the drain assembly. Operate the water faucet until the washbasin is full. Make a mark to identify the level of water.
5.In the lavatory: Examine the water level after 5 minutes.	In the lavatory: The water level in the washbasin does not change.
6.In the lavatory: Pull the drain plug to drain the water. Let the water drain.	In the lavatory: The water drains from the washbasin. The drain lines are filled.
7.In the lavatory: Make a mark to identify the new level of water. Examine the water level after 5 minutes.	In the lavatory: The water level does not change.
8.At the drain mast: Open the shutoff valve assembly. Examine the rate of the water flow from the drain mast.	In the lavatory: The water drains from the washbasin.

5. Close-up
Subtask 38-32-00-613-053-A

A. Fill the potable water system (Ref. AMM TASK 12-15-38-613-001).

Subtask 38-32-00-410-054-A

B. Close Access
(1) Remove the hose and the VALVE - SHUT OFF.
(2) If the 98D38108002000 ADAPTER DRAIN MAST is installed, remove it.
(3) Remove the CONTAINER 20L (5 USGAL).
(4) Remove the access platform(s).
(5) Make sure that the work area is clean and clear of tools and other items.
(6) Close the applicable lavatory door (Ref. AMM D/O 25-41-00-00) or (Ref. AMM D/O 25-43-00-00).

Subtask 38-32-00-865-052-A

C. 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	WASTE WIP-DRAINMAST-FWD	1DU	B06
** ON A/C NOT FOR ALL
2000VU	DRAINMAST-FWD	1DU	B03
** ON A/C NOT FOR ALL
2000VU	WASTE WIP-DRAINMAST-FWD	1DU	B03
** ON A/C ALL
2001VU	WASTE WIP-DRAINMAST-AFT	11DU	E01
** ON A/C NOT FOR ALL
2001VU	WASTE WIP-DRAINMAST-MID	21DU	E02

Subtask 38-32-00-862-051-A

D. De-energize the aircraft electrical network (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 04:27:17 UTC