Removal of the Flush-Line Check Valves

TASK 38-31-76-000-001-A
Removal of the Flush-Line Check Valves

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.

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: WHEN YOU REMOVE A COMPONENT OF THE TOILET WASTE SYSTEM, ALWAYS DISINFECT THE PART BEFORE YOU PUT IT IN A PLASTIC BAG, THEN SEAL THE BAG. DO NOT PUT DOCUMENTS INTO THE PLASTIC BAG. SEAL THE BAG FIRST,THEN ATTACH THE DOCUMENTS TO IT. THIS WILL PREVENT INFECTION OR ILLNESS. CONTAMINATION FROM THE WASTE CAN BE DANGEROUS TO HEALTH.

NOTE: The removal of the forward flush-line check valve 3322MM is given. The procedure is the same for the aft check valve 3323MM.

FIN: 3322MM
FIN: 3323MM

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

REFERENCE	QTY	DESIGNATION
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
161DW, 162DW

C. Referenced Information

REFERENCE	DESIGNATION
TASK 21-31-51-000-001-A	Removal of the Outflow Valve (From Inside)
TASK 21-31-51-000-006-A	Removal of the Outflow Valve (From Outside)
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 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 38-30-00-510-001-A	Decontamination of Components of the Waste/Water and Toilet System for Shipping and/or Installation
TASK 38-31-00-680-001-A	Draining of the Toilet System
Flush Line Check-Valve ** ON A/C NOT FOR ALL
Flush Line Check-Valve ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 38-31-76-861-050-A

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

Subtask 38-31-76-680-050-A

B. Drain and flush the toilet system (Ref. AMM TASK 38-31-00-680-001).

Subtask 38-31-76-010-050-A

C. Get Access
(1) Remove outflow valve 10HL to get access to flush-line check valve 3322MM (Ref. AMM TASK 21-31-51-000-001) (Ref. AMM TASK 21-31-51-000-006).
(a) Make sure that partitions 161DW and 162DW are removed (Ref. AMM TASK 25-55-12-000-001).

Subtask 38-31-76-865-063-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-VACUUM-SYS	35MG	A06
** 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 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	VACU TOIL SYS-VACU-GEN	33MG	A08
** 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

4. Procedure
Subtask 38-31-76-020-050-A

A. Removal of Flush-Line Check Valve 3322MM

WARNING: ALWAYS WEAR RUBBER GLOVES, GOGGLES AND PROTECTIVE CLOTHES WHEN YOU DO THIS TASK.

(1) Disconnect the pipe unions (1).
(2) Remove flush-line check valve 3322MM (2).
(3) Put the PLUG-BLANKING in each disconnected line end.
(4) If you use removed parts again, clean and disinfect them (Ref. AMM TASK 38-30-00-510-001).

[Rev.10 from 2021] 2026.04.01 01:21:09 UTC