LAVATORY SINK CABINET - REMOVAL/INSTALLATION
1. General
A. The lavatory sink cabinet houses the passenger water system components, which can be removed with the cabinet, but must be drained and disconnected before removal of the cabinet can be accomplished.
CAUTION: HANDLE CABINET WITH CARE TO AVOID DAMAGING CABINET AND/OR LAVATORY TRIM.
2. Equipment and Materials
A. Sealant - BMS 5-95, Class B (Ref 20-30-11)
B. Sealant - BMS 5-108, Type 1, Class B-2 (Ref 20-30-11)
C. Solvent - General Purpose, BMS 3-2 (Ref 20-30-31)
3. Remove Sink Cabinet (Fig. 401)
A. Drain and disconnect water system connections (Ref Chapter 38, Passenger Water System).
B. Remove dispenser cabinet above sink cabinet (Ref 25.41-11, Removal/ Installation).
C. Remove part of aft lavatory air intake grille vent tubing going through sink cabinet.
D. Remove fasteners attaching sink cabinet to the lavatory forward wal1 and floor.
E. Lift sink cabinet to clear toilet shroud and remove from lavatory.
F. If sink cabinet is to be replaced, remove toilet shroud trim and other equipment as required. Place equipment in safe place for installation in replacement cabinet.
4. Install Sink Cabinet (Fig. 401)
A. Prepare floor for appication of sealant and coating. Clean with solvent.
B. Apply sealant.
(1)
Lightly sand any enamel to be covered by sealant.
(2)
Apply bead of BMS 5-95 sealant to all cracks, small openings, joints and internal corners.
(3)
Coat floor area with BMS 5-108 type 1 class B coating to thickness of 0.020 to 0.030 inch for corrosion protection.
C. If removed, install toilet shroud trim.
D. Place sink cabinet in position and install fasteners to secure cabinet to forward lavatory wall and floor.
E. Install part of aft lavatory air intake grille vent tubing going through sink cabinet.
F. Install dispenser cabinet above sink cabinet (Ref 25-41-11, Removal/ Installation).
G. Install miscellaneous equipment, removed in step 2.F.
H. Connect and service water system (Ref Chapter 38, Passenger Water System).
I. Close cabinet disposal compartment door.
May 15/80 25-40-1 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Lavatory Sink Cabinet Installation 542
25-40-1 Figure 401 (Sheet 1) Nov 01/75
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
514 Lavatory Sink Cabinet Installation
Aug 15/72 Figure 401 (Sheet 2) 25-40-1
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Lavatory Sink Cabinet Installation 514
25-40-1 Figure 401 (Sheet 3) Aug 15/72
Page 404
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
FORWARD LAVATORY PARTITION - REMOVAL/INSTALLATION
1. General
A. The forward lavatory partition forming the aft wall of the lavatory is a permanent-type installation secured to the ceiling, sidewall, and floor structure.
B. Varied equipment is attached to the partition, which may remain attached to the partition, if the partition is to be reinstalled. However, all electrical wiring to the partition must be disconnected before removal of the partition is attempted. References to chapters or sections covering the major items attached partition are given in the procedures. For items that are not referenced, refer to their appropriate subject chapter and/or section.
2. Equipment and Materials
A. Sealant, Moisture - BMS 5-28, Type 7 (Ref 20-30-11)
B. Solvent, General Purpose Cleaning -BMS 3-2 (Ref 20-30-31)
3. Prepare to Remove Partition
A. Open LAV MIRROR LIGHTS circuit breaker on P18 and P6 circuit breaker panels.
B. Remove toilet back shroud (Ref 25-42-12).
C. Remove toilet tank shroud fasteners and remove toilet tank shroud.
D. Remove support angles for toilet back and toilet tank shroud from partition.
E. Unfasten toilet tank tiedown rods from tank (Ref 38-32-51).
F. Remove floor pan (Ref 25-40-08).
G. Remove lavatory ceiling panel (Ref 25-40-5).
H. Remove lavatory sidewall panel (Ref 25-40-4).
I. Remove lavatory door header (Ref 25-25-11).
J. On Passenger/Cargo Convertible Airplanes,
remove oxygen service unit (Ref 25-23-32).
K. On Passenger/Cargo Convertible Airplanes,
remove cargo door control panel.
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