Installation of the Self-Closing Element

TASK 38-12-41-400-002-A
Installation of the Self-Closing Element

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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	ALLEN KEY - DRIVER PNR ISO 2936-2.5
W035090087	1	SPECIAL KEY

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.11AKG9)	Disinfectant-Potable Water System - Legacy

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	SPRING CLIP	AIPC 38-12-41-05-020

D. 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 38-10-00-614-001-A	Pressurization of the Potable Water System from a Ground Air Supply
TASK 38-12-00-820-001-A	Adjustment of the Water Flow Time of the Water Faucet
TASK 38-12-41-400-008-A	Installation of the Cartridge Assembly
Selfclosing - Element

3. Job Set-up
Subtask 38-12-41-860-052-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the potable water-shutoff valve in the lavatory is closed.
(3) Make sure that the work area is clean and clear of tools and other items.

4. Procedure
Subtask 38-12-41-420-051-D ** ON A/C NOT FOR ALL

A. Installation of the Water-Faucet Self-Closing Element.

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.

(1) Remove the blanking plugs from the faucet housing (7).
(2) If removed, install the cartridge assembly in the faucet housing (7) (Ref. AMM TASK 38-12-41-400-008).

NOTE: This procedure for the installation of the water-faucet self-closing element is the same in all lavatories.

(3) Remove the self-closing element (6) from the CONTAINER - CLEAN, APPLICABLE.
(4) Disinfect the self-closing element (6) and the faucet housing (7) with Disinfectant-Potable Water System - Legacy (Material No.11AKG9) .

NOTE: Spray the disinfectant from a distance of approximately 10 cm maximum.

NOTE: The disinfectant must react with surfaces for 5 minutes minimum.

NOTE: The disinfected components should not be dried after the disinfection and should be installed in wet condition.

(5) Use a W035090087 SPECIAL KEY to install the self-closing element (6).
(6) Install the spring (5) and the grip sleeve (4).
(7) Install the new AIPC 38-12-41-05-020 SPRING CLIP (3).
(8) Install the cap assembly (2):
(a) Loosely install the screw (1) in the side-borehole of the cap assembly (2).
(b) Install the cap assembly (2) on the faucet housing (7).
(c) Align the screw (1) of the cap assembly (2) with the rear side of the faucet housing (7).
(d) Tighten the screw (1) with the ALLEN KEY - DRIVER PNR ISO 2936-2.5.

Subtask 38-12-41-790-051-A ** ON A/C NOT FOR ALL

B. Leak Check.
(1) Open the potable water shutoff valve in the lavatory.
(2) Make sure that there is enough water in the potable water tank, if necessary fill (Ref. AMM TASK 12-15-38-613-001).
(3) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001).
(4) Operate the water faucet and make sure that it functions correctly.
(5) If necessary do the adjustment of the water-flow time of the water faucet (Ref. AMM TASK 38-12-00-820-001).
(6) Make sure that there are no leaks, leaks are not allowed.

5. Close-up
Subtask 38-12-41-410-055-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the lavatory door.

Subtask 38-12-41-862-050-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.02 06:25:39 UTC