S 392-091-B00
 (4)  Procedure 3 - Corrosion protection below the head area and shank of the fastener and the bottom attaching hardware:
 (a)  
Apply sealant to the entire shank and thread of the fastener.

 (b)  
Install the fastener.

 1)  A continous extrusion of sealant is necessary around the base of the washer, if used under the fastener head.
 NOTE: More sealant can be applied to the shank of
____ the installed fastener to get the necessary sealant extrusion.
 (c)  
Install the nut or collar.

 (d)  
A continous extrusion of sealant is necessary around the fastener head, the washer (if used), and the bottom of the nut or collar.

 (e)  
Clean off unwanted sealant.

 S 392-092-B00
 (5)  Apply fillet-seal to the installed fastener.
 (a)  Use class A or class B (brushable) sealants.
 NOTE: Brush marks are permitted if the fillet-sel dimensions
____
 are met.

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A
737-300/400/500MAINTENANCE MANUAL
 TASK 51-31-00-392-051-B00
 9.  Aerodynamic Smoother Application________________________________
 A. Equipment
 (1)  
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.

 (2)  
Spatula made of wood or plastic

 (3)  
Sealing gun and nozzles

 B. Consumable Materials
 (1)  
G00138 Masking Tape - Permacel No. 70 or 85,
 American Tuck No. 210

 (2)  
Aerodynamic Smoother

 C. References
 (1)  51-41-00/001, Airframe Drainage
 D. Procedure
 S 302-052-B00
 (1)  
Do the Prepare for Sealing task.

 S 952-053-B00

 (2)  
Apply the masking tape to the surface that is adjacent to the damaged area.

 S 392-054-B00
 CAUTION: DO NOT CAUSE A BLOCKAGE WHEN YOU APPLY SEALANT NEAR OR AROUND
_______ THE FUSELAGE DRAIN HOLES, TUBES, OR PATHS. THE FUNCTION OF THE DRAIN HOLES IS TO DRAIN CONDENSATION AND FLUIDS OVERBOARD. IF YOU CAUSE A BLOCKAGE, FLUIDS WILL COLLECT IN THE AIRPLANE. THE FLUIDS CAN CAUSE CORROSION TO THE STRUCTURE, OR A FIRE IF THE FLUIDS ARE FLAMMABLE.
 WHEN YOU APPLY THE AERODYNAMIC SMOOTHER TO THE WING-TO-BODY FAIRINGS, LIMIT YOUR APPLICATIONS TO THE LOCATIONS SHOWN IN AMM 51-41-00/001. THE CLEARANCES BETWEEN THE FAIRING PANELS ARE MADE TO LET THE FLUIDS IN THE FAIRING TO DRAIN OVERBOARD.
 (3)  Apply the aerodynamic smoother with a flow gun or spatula. Make sure there are no air bubbles when you apply the aerodynamic smoother.
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A 737-300/400/500MAINTENANCE MANUAL

Aerodynamic Sealer
Figure 205

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 S 392-055-B00
 (4)  Apply more of the aerodynamic smoother, if it is necessary, to make the the edges around the seal smooth.
 NOTE: Because of shrinkage, you must apply the sealant again,
____ approximately 8 hours apart, to fill the clearances.
 S 392-056-B00
 (5)
Use a spatula to make the seal smooth with the masking tape.

 S 952-057-B00

 (6)  
Remove the masking tape after the seal is smooth or let the masking tape stay for the curing time.
　
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