Removal of the Inline Filters

TASK 38-12-41-000-007-A
Removal of the Inline Filters

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 10 L(2 1/2 USGAL)
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 25-45-26-000-001-A	Removal of the Lining
TASK 38-10-00-614-002-A	Depressurization of the Potable Water System
Inline Filters

3. Job Set-up
Subtask 38-12-41-861-056-A ** ON A/C NOT FOR ALL

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

Subtask 38-12-41-010-059-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Remove the lining (Ref. AMM TASK 25-45-26-000-001).

NOTE: Only necessary, if the electronic water faucet is installed.

Subtask 38-12-41-865-066-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-LAV PWR-M	34MG	A04
2001VU	VACU TOIL SYS-LAV PWR-D	39MG	A03
2001VU	VACU TOIL SYS-LAV PWR-L	45MG	A02
2001VU	VACU TOIL SYS-LAV PWR-A	32MG	A01

Subtask 38-12-41-860-064-A ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration
(1) Install the hoses on the drain masts 4DU and 14DU.
(2) Put the containers below the drain masts 4DU and 14DU.
(3) Put the ends of the hoses into the CONTAINER 10 L(2 1/2 USGAL).
(4) Release the pressure from the potable water system (Ref. AMM TASK 38-10-00-614-002).
(5) In the lavatory, turn the potable-water shutoff valve to the CLOSED position.
(6) Put a CONTAINER 5 L (1.32 USGAL) below the related connections.

Subtask 38-12-41-941-051-A ** ON A/C NOT FOR ALL

E. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to open the potable-water shutoff valve in the lavatory.

4. Procedure
Subtask 38-12-41-020-056-A ** ON A/C NOT FOR ALL

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: MAKE SURE THAT THE WATER TANK IS DEPRESSURIZED.

WARNING: DO NOT TOUCH THE WATER HEATER UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

A. Removal of the Inline Filters

NOTE: This procedure is the same for all of the lavatories which have the electronic water faucet.

(1) Make match marks on the items.

NOTE: To prevent errors on the assembly, it is necessary to put marks on the parts before you disassemble them.

(2) Make sure that there is no pressure in the potable water line.
(3) Disconnect the aircraft water-inlet-hose fittings (3) and (4) from the hydraulic box (1) and remove the inline filters (2).
(4) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.02 06:25:41 UTC