Installation of the Washbasin

TASK 25-45-38-400-001-A
Installation of the Washbasin

ZONE: 200

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06CMD9)	Silicone Adhesive Sealant-General Purpose One part legacy

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

C. Referenced Information

REFERENCE	DESIGNATION
TASK 20-21-11-911-001-A	Tightening Torques for Standard Threaded Fasteners
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 25-45-13-000-001-A	Removal of the Lavatory Mirror
TASK 25-45-13-400-001-A	Installation of the Lavatory Mirror
TASK 25-45-14-000-001-A	Removal of the Soap Dispenser
TASK 25-45-14-400-001-A	Installation of the Soap Dispenser
TASK 25-45-25-000-001-A	Removal of the Baby Nursing Table
TASK 25-45-25-400-001-A	Installation of the Baby Nursing Table
TASK 38-12-41-000-001-A	Removal of the Water Faucet
TASK 38-12-41-400-001-A	Installation of the Water Faucet
Drain Valve Control Assembly
Wash Basin
Toilet Roll Holder

3. Job Set-up
Subtask 25-45-38-860-050-A

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001)
(2) Make sure that the:

lavatory mirror is removed (Ref. AMM TASK 25-45-13-000-001)
water faucet is removed (Ref. AMM TASK 38-12-41-000-001)
baby nursing table is removed as necessary (Ref. AMM TASK 25-45-25-000-001)
soap dispenser is removed (Ref. AMM TASK 25-45-14-000-001).

4. Procedure
Subtask 25-45-38-210-050-A

A. Preparation for Installation
(1) Clean the component interfaces and the adjacent area.
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.

Subtask 25-45-38-560-050-A

B. Preparation of a Replacement Component

Drain Valve Control Assembly

(1) Remove the drain-valve control assembly (2) as follows:
(a) Open the access door (1).
(b) Loosen the locknut (5) and the screw (6).
(c) Loosen the locknut (3) and remove the stud (4).
(d) Remove the nut (9) and the washer (10) from the valve body (8).
(e) Remove the drain-valve control assembly (2) from the wash basin.
(f) Remove the seal (11).
(2) Install the drain-valve control assembly (2) as follows:

NOTE: Unless specified, TORQUE all nuts, bolts and screws (Ref. AMM TASK 20-21-11-911-001).

(a) Install the seal (11) on the valve body (8).
(b) Put the drain-valve control assembly (2) in position on the wash basin and install the washer (10) and the nut (9).

NOTE: Make sure that the drain-valve (2) connects with the control arm (7).

(c) Install the stud (4) and tighten the locknut (3).
(d) Tighten the screw (6) and the locknut (5).
(e) Operate the drain-valve control assembly (2) and make sure it functions correctly.

Subtask 25-45-38-420-050-A

C. Installation of the Wash Basin

Wash Basin

Toilet Roll Holder

NOTE: Unless specified, TORQUE all nuts, bolts and screws (Ref. AMM TASK 20-21-11-911-001).

(1) Put the wash basin (2) in position and install the screws (16).
(2) Install the screws (15).
(3) Install the screw (14).
(4) Put the waste chute (6) in position and install the screws (5).
(5) Put the damper (4) in position on the waste chute (6) and install the pin (8), the spacers (7) and the spring clips (9).
(6) Remove the PLUG-BLANKING from each disconnected line end.
(7) Make sure that the hoses (11) and (12) are clean and clear of blockage.
(8) Connect the hoses (11) and (12) to the wash basin (2) and install the clamps (10) and (13).
(9) Install the screws (3).
(10) Apply Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) in the distance between the lavatory wall and the wash basin (2).
(11) Put the toilet roll holder (4) in position on the lining (2) and push the holder (4) until the clips (3) lock in the lining (2).

Toilet Roll Holder

(12) Close the access door (1).
(13) Make sure that the work area is clean and clear of tools and other items.

5. Close-up
Subtask 25-45-38-410-050-A

A. Close Access
(1) Install the soap dispenser (Ref. AMM TASK 25-45-14-400-001).
(2) Install the baby nursing table if removed (Ref. AMM TASK 25-45-25-400-001).
(3) Install the water faucet (Ref. AMM TASK 38-12-41-400-001).
(4) Install the lavatory mirror (Ref. AMM TASK 25-45-13-400-001).

Subtask 25-45-38-862-050-A

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

[Rev.10 from 2021] 2026.04.01 06:22:01 UTC