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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

APPLICATION OF FILLET FILLET SEAL FULL BODY SEAL FINISHED DIMENSIONS

APPLY SEALANT WITH A FLOW GUN USE AN UNLUBRICATED FAIRING TOOL TO PUSH THE SEALANT INTO POSITION
Fillet Seal Figure 203
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A
737-300/400/500MAINTENANCE MANUAL
 S 392-042-B00
 (7)  Apply the sealant again to get a full body fillet.
 NOTE: A second application of the sealant is necessary only for
____ integral fuel tanks. You can cut the nozzle end to give the full body seal some contour.
 S 392-043-B00
 (8)  
Use the fairing tool to get the last shape of the fillet.

 S 392-044-B00

 (9)  
Push the tool against the sealant and move the tool parallel to the bead.

 S 212-045-B00

 (10)
 Make sure the seal is smooth.  Make sure there are no air bubbles in the seal.

 S 212-046-B00

 (11)
 Make sure the bead has the shape of a faired fillet, after the work is completed.

 TASK 51-31-00-392-047-B00
 8. Fastener Seal Application
_________________________
 A. General
 (1)  
If the fasteners were installed during the pot life of the sealant, sealing is not necessary.

 (2)  
Install the rivets dry, unless you are told differently.

 NOTE: Install 5056 aluminum rivets wet with sealant in aluminum
____ structure. Install 5056 aluminum rivets dry in magnesium structure.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 B.
C.
D.
A
737-300/400/500MAINTENANCE MANUAL
 (3)  Use the specified procedure for fastener sealing for corrosion prevention.
 NOTE: When a procedure is not specified, use procedure 1.
____
Equipment
 (1)  
Fillet Fairing Tools

 (2)  
Sealant Removal Tool - made from wood or plastic 3/16 inch thick, 8 inches long in 1/4, 1/2 and 3/4 inch widths.

 (3)  
Spatula made of wood or plastic

 (4)
Sealing gun and nozzlesFastener Sealing

 S 302-048-B00

 (1)  
Do the Prepare for Sealing task.

 S 392-049-B00
 CAUTION: DO NOT CAUSE A BLOCKAGE WHEN YOU APPLY SEALANT NEAR OR AROUND
_______ THE FUSELAGE DRAIN HOLES, TUBES OR PATHS. THE DRAIN HOLES DRAIN FLUIDS AND CONDENSATION OVERBOARD. IF YOU CAUSE A BLOCKAGE, FLUIDS WILL COLLECT. THE FLUIDS CAN CAUSE CORROSION TO THE STRUCTURE, OR A FIRE IF THE FLUIDS ARE FLAMMABLE.
 (2)  Use one of these procedures to seal the fasteners that are installed through faying surface. Use these procedures when the sealant pot life has ended or when no faying surface sealant is used (Fig. 204):
 (a)  
Apply the sealant to the fastener or hole at the installation.

 (b)  
Apply the sealant to the fastener after the installation.

 (c)  
Make the sealant smooth around the fastener after the
 installation.

 S 392-050-B00
 (3)  
Seal the fasteners that have metal covers as follows:

 (a)  
Fill the metal cover between 1/2 to 2/3 full of sealant.

 (b)  
Push the metal cover down on the fastener until the flange touches the structure.

 (c)  
Remove the unwanted sealant from the top of the metal cover.

 (d)
Make the sealant smooth around the base of the metal cover.Fastener Sealing for Corrosion Prevention

 (1)  
Clean the surface, do Prepare the Surface.

 S 392-089-B00

 (2)  
Procedure 1 - corrosion protection below the head area of the fastener:
　
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