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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A 737-300/400/500MAINTENANCE MANUAL
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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