Water Leakage from Potable Water System

TASK 38-12-00-810-815-A
Water Leakage from Potable Water System

1. Possible Causes

water filter
connections
lines

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 12-15-38-613-001	Fill the Potable Water Tank System (Aircraft Electrical Power Available)
AMM 20-23-38-300-001	Repair of the Tubes Assembly of the Potable Water and the associated Air Supply System to be carried out in the Workshop
AMM 20-23-38-300-002	Repair of the Tubes of the Potable Water and the associated Air Supply System to be carried out in the Aircraft
AMM 20-23-38-300-048	Repair of the Tubes with H-Fittings to be carried out in the Aircraft
AMM 20-23-38-300-049	Temporary Repair of the Tube Assemblies with MS21922 Sleeves to be carried out in the Workshop
AMM 38-10-00-614-001	Pressurization of the Potable Water System from a Ground Air Supply
Routing of Potable Water Lines

3. Fault Confirmation
Subtask 38-12-00-710-078-A

A. Aircraft configuration
(1) Make sure that there is water in the potable water system, if necessary do the servicing AMM 12-15-38-613-001.
(2) Make sure that the potable water system is pressurized AMM 38-10-00-614-001.

4. Fault Isolation
Subtask 38-12-00-810-065-A

A. If you see a flow of water from the potable water system:

do a check in the logbook to make sure if any work was performed on the system.

(1) If work was done in the galley do a check and make sure that:

The water filter does not leak.
All connections , lines and plugs are tightened.
The interface to all other users does not leak.

(2) If work was done in the lavatory:

Do a check and make sure that all connections and lines do not leak.

(3) If the fault continues:

Use the illustration to trace for possible leaks.
Routing of Potable Water Lines

(4) If leaks are found, tighten the connection or repair the line AMM 20-23-38-300-001, AMM 20-23-38-300-002 or AMM 20-23-38-300-048 and AMM 20-23-38-300-049.

5. Close-up
Subtask 38-12-00-710-079-A

A. After consequent maintenance or repair, pressurize the potable water system and make sure that the system does not leak.

[Rev.8 from Aug 2018] 2026.04.04 04:34:12 UTC