53-14-00
 ALL  ú ú B01 Page 1 ú Jun 25/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 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 (Fig. 1). The panels are installed with a peripheral tape to provide a liquid barrier between the passenger cabin and lower compartments. Beginning with line number 2800 (June 1996) an integral door-sill gutter floor panel (Fig. 2) was incorporated on 737-300/400/500 models to provide additional moisture barrier protection. 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 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.

FWD
FLOOR PANEL
TRANSVERSE FLOOR BEAM
Figure 1

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 53-21-00
 ALL  ú ú B01 Page 1 ú Nov 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

Integral Floor Panel Drain
Figure 2

 G14706
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 53-21-00
 ALL  ú ú B01 Page 2 ú Nov 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 PASSENGER CABIN FLOORS - REMOVAL/INSTALLATION
_____________________________________________
 TASK 53-21-00-004-001-B00
 1.  Passenger Cabin Floor Panel Removal___________________________________
 A. Standard Tools and Equipment
 (1)  Sealant Removal Tool - Hardwood, or Plastic
 B. Reference
 (1)  AMM 53-21-11/801, Water Barrier
 C. Access
 (1)  Location Zone
 24 Passenger Cabin

 D. Passenger Cabin Floor Panel Removal
 S 014-002-B00
 (1)  Break the panel seals.
 (a)  
If the water barrier is installed, get access to the panel fasteners (AMM 53-21-11/801).

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

 (c)  
Break the seals without a nylon cord installed with the sealant removal tool.

 S 034-021-B00
 (2)  
Disconnect drain lines from integral door-sill gutter panels (Fig. 401), if necessary.

 S 034-004-B00

 (3)  
Remove the fasteners.

 (4)  
Remove the panel.

 S 024-003-B00
 TASK 53-21-00-404-005-B00
 2.  Passenger Cabin Floor Panel Installation________________________________________
 A. Consumable Materials
 (1)  
A00247 Sealant - BMS 5-95

 (2)  
A02315 Sealant - BMS 5-142

 (3)  
A00302 Sealant - BMS 5-125

 (4)  
A00326 Sealant - MIL-S-46163, Type III, Grade R, Flexane 80.

 (5)  
D00015 Compound - MIL-C-11796, Class III, Corrosion Preventive

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