Installation of the Drain Valve

TASK 38-14-45-400-001-A
Installation of the Drain Valve

FIN: 14MP ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
132PW, 825

B. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
11	COTTER PIN	AIPC 38-14-48-01-040

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-15-38-613-001-A	Fill the Potable Water Tank System (Aircraft Electrical Power Available)
TASK 12-24-38-680-001-A	Draining of the Potable Water System (with Electrical Power)
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 25-54-12-400-001-A	Installation of the Forward Cargo-Compartment Partition
TASK 38-10-00-614-001-A	Pressurization of the Potable Water System from a Ground Air Supply
TASK 38-14-00-710-001-A	Operational Test of the Potable Water Drain-System
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Drain Valve (14MP)

3. Job Set-up
Subtask 38-14-45-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized from the external power (Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the potable water system is drained (Ref. AMM TASK 12-24-38-680-001).

Subtask 38-14-45-865-051-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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-DRAIN	1MP	B05
** ON A/C NOT FOR ALL
2001VU	WATER-SYS-DRAIN	1MP	B05

Subtask 38-14-45-560-050-A ** ON A/C NOT FOR ALL

C. Preparation for Installation

Drain Valve (14MP) ** ON A/C NOT FOR ALL

(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) If removed, put the insulation sleeve (12) in position.

4. Procedure
Subtask 38-14-45-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Drain Valve Assembly
(1) Remove the PLUG-BLANKING from each disconnected line end.
(2) If removed, install the insulation sleeve (12).
(3) Put the spacers (1) and the drain valve assembly (6) in their installation positions.
(4) Make sure that the lever of the drain valve assembly (6) is in the SHUT position.
(5) Install the washers (3) and the bolts (4).
(6) Tighten the bolts (4).
(7) Protect the bonding (Ref. AMM TASK 20-28-00-912-802).
(8) Install the linkage (8) on the drain valve assembly (6).
(9) Install the pin (9), the washer (10) and the new AIPC 38-14-48-01-040 COTTER PIN (11).
(10) Connect the pipe (5) and the hose (2) to the drain valve assembly (6).
(11) Remove the CAP-BLANKING from each electrical connector and receptacle.

CAUTION: MAKE SURE THAT ELECTRICAL CONNECTORS ARE CLEAN WHEN YOU CONNECT THEM. THE CONTAMINATION OF ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO THE EQUIPMENT.

(12) Connect the electrical connector (7) to the drain valve assembly (6).

Subtask 38-14-45-860-050-A ** ON A/C NOT FOR ALL

B. Preparation for Test
(1) Fill the potable water system (Ref. AMM TASK 12-15-38-613-001).
(2) Pressurize the potable water system (Ref. AMM TASK 38-10-00-614-001).
(3) Examine the drain valve 14MP and the connections for leaks.

NOTE: Leaks are not permitted.

Subtask 38-14-45-865-054-A ** ON A/C NOT FOR ALL

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	WATER SYSTEM-QANT-IND	1MA	B01
** 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 38-14-45-710-050-A ** ON A/C NOT FOR ALL

D. Do the operational test of the drain system (Ref. AMM TASK 38-14-00-710-001).

5. Close-up
Subtask 38-14-45-410-050-A ** ON A/C NOT FOR ALL

A. Close Access

Drain Valve (14MP) ** ON A/C NOT FOR ALL

(1) Close the insulation sleeve (12).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Install access panel 132PW (Ref. AMM TASK 25-54-12-400-001).
(4) Set CARGO COMPT LIGHT switch 6LU to OFF position.
(5) Close FWD cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).
(6) Remove the access platform(s).

Subtask 38-14-45-862-050-A ** ON A/C NOT FOR ALL

B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.02 06:25:44 UTC