5.  Wheel Well Corrosion Inhibitor Application
A.  Mask all plastic and glass gage covers, light lenses, and all exposed bearing surfaces to prevent damage from solvents during application and curing. Mask bearing surfaces to preclude any buildup that might interfere with operation of the component.
B.  Thin the corrosion inhibitor to obtain the proper spray viscosity and to aid in the application of a thin continuous film.
CAUTION:  THE CORROSION INHIBITOR IS FLAMMABLE. PRIOR TO THE APPLICATION TO THE WHEEL WELL AREAS AND DURING CURE ALL POWER TO THE AIRPLANE MUST BE OFF AND THE AIRPLANE MUST BE PROPERLY GROUNDED PER CHAPTER 20, STATIC GROUNDING.
C.  Replace the tire-burst protection screens. The screens shall be coated with the removable coating.
545 
Feb 20/84  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  53-14-0 Page 703 

PASSENGER CABIN FLOORS - DESCRIPTION AND OPERATION
1. General
A.  The cabin floor consists of panels which lie between the longitudinal seat tracks and are supported by these tracks and by the transverse floor beams beneath them. (See figure 1.) The panels are installed with a peripheral tape to provide a liquid barrier between the passenger cabin and lower compartments. The panels have lifting straps.
B.  The floor beams in any part of the fuselage between body stations 178 and 1016, excluding the portion over the center wing box, consist of transverse horizontal beams attached at their ends to the fuselage frames. Each beam carries a tension load when the fuselage is pressurized, in addition to its normal function of supporting the four longitudinal cabin seat tracks and the floor panels. Over the center wing box the cabin seat tracks and floor panels are supported by four longitudinal floor beams attached directly to the upper skin of the center wing box. Short transverse floor beams connect the most outboard of these beams to the fuselage frames in this area.

H29189
506  Typical Floor Structure 
Feb 15/69  Figure 1  53-21-0 
Page 1 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

PASSENGER CABIN FLOORS - REMOVAL/INSTALLATION
1.  Passenger Cabin Floor Panel Removal/Installation
A.  General
(1)  
Special procedures to seal and apply finishes are necessary for the floor panels that are below galleys and lavatories. Special procedures to seal and apply finishes are necessary for the wet areas of the entry and exit doorways. These special procedures will prevent water damage and corrosion.

(2)  
The wet areas extend a minimum of 20 inches around the galleys and the lavatories. The wet areas also extend the width of the body a minimum of 20 inches forward and aft of the entry and exit doorways.

B.  Equipment and Materials
(1)  
Sealant removal tool - Hardwood, or Plastic

(2)  
Sealant - BMS 5-95 (Ref 20-30-11)

(3)  
Sealant - Flexane 80 (Ref 20-30-11)

(4)  
Tape - BMS 8-283A Type 1 (Ref 20-30-51)

(5)  
Tape mystic 7300 (Ref 20-30-51)

(6)  
Grease - BMS 3-24 (Ref 20-30-21)

(7)  
Corrosion Inhibiting Compound -BMS 3-26 (Ref 20-30-21)

C.  Remove Passenger Cabin Floor Panel
(1) 
 Break seals.

(a)  
If water barrier is installed, gain access to panel fasteners per Water Barrier - AR.

(b)  
If nylon cord is imbedded in sealant, pull nylon cord to break seal.

(c)  
Seals without nylon cord may be broken with a removal tool.

(2) 
 Remove fasteners.

(3) 
 Remove panel.

D.  Install Passenger Cabin Floor Panel
(1)  
Rectify all damage to finish on support structure.

(2)  
Under a galley, toilet, entryway or service doorway area, spray upper and lower surfaces of support structure attachment flanges and for about 2 inches down vertical members with Anticorrosion Compound.

(3)  
Allow solvent to flash off, then spray same area with Anticorrosion Compound.

(4)  
Spray all attachment clip nuts with Anticorrosion Compound.

(5)  
Allow solvent to flash off, then spray nuts with Anticorrosion Compound and install them on structure attachment flanges while solvent is still wet.

(6)  
Install rubber seals on bottom of floor panel, so that they will be above support structure and of correct thickness throughout.

(7)  
Before installing Boeing floor panels under a galley, toilet, entryway or service doorway area, countersink all bolthead and fastener locations.