Removal of the Drain Valve

TASK 38-14-41-000-002-A
Removal of the Drain Valve

WARNING: MAKE SURE THAT THE WATER TANK IS DEPRESSURIZED.

FIN: 4MP

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	ACCESS PLATFORM 2M (6 FT)
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
131HW, 825

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-24-38-680-001-A	Draining of the Potable Water System (with Electrical Power)
TASK 12-24-38-680-002-A	Draining of the Potable Water System (without Electrical Power)
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 25-54-12-000-003-A	Removal of the Sidewall Panels in the Forward Cargo Compartment
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-003-A	Open the FWD or Aft Cargo-Compartment Door with the Hand Pump
Drain Valve

3. Job Set-up
Subtask 38-14-41-861-051-A

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

Subtask 38-14-41-613-052-A

B. Drain the potable water tank and potable water lines (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002).

Subtask 38-14-41-010-055-A

C. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) in position at forward cargo-compartment door 825.
(2) Open forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-001) or (Ref. AMM TASK 52-30-00-860-003).
(3) Set cargo-compartment light switch 6LU to ON position.
(4) In the forward cargo compartment, remove sidewall panel 131HW (Ref. AMM TASK 25-54-12-000-003) .
(5) Remove the insulation blanket from drain valve [4MP] .

Subtask 38-14-41-865-053-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
124VU	SVCE/601PP/602PP/SPLY	1PX	BB01

4. Procedure
Subtask 38-14-41-020-052-A

A. Removal of the Drain Valve Assembly

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(1) Disconnect the electrical connector (7) from the drain valve assembly (3).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Disconnect the tee (13).

NOTE: If the swivel nut connection is blocked, it is possible to loosen the other connections of the tee (13) and remove the drain valve assembly (3) together with the tee (13).

(4) Disconnect the pipe (4).
(5) Put the PLUG-BLANKING in each disconnected line end.
(6) Remove and discard the cotter pin (9).
(7) Remove the washer (10).
(8) Remove the pin (11) and disconnect the linkage (12).
(9) Remove the screws (1), the washers (2) and the spacers (5).

CAUTION: MAKE SURE THAT THE ELECTRICAL WIRE(S) IS(ARE) DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).

(10) Disconnect the bonding strap (6).
(11) Remove the drain valve assembly (3) from the support (8).

[Rev.10 from 2021] 2026.04.02 06:25:43 UTC