B. Equipment
(1) Spatula made of wood or plastic
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
Faying Surface Seal
Figure 201
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A
737-300/400/500MAINTENANCE MANUAL
(2) Sealing gun and nozzles
C. Consumable Materials
(1) G00771 Parting Agent - Green Strppable Vinyl Coating 4A-183
D. Procedure
S 302-080-B00
(1) Do the Prepare for Sealing task.
S 392-019-B00
CAUTION:_______DO NOT LET A WET PARTING AGENT TOUCH AN ACRYLIC SURFACE. IF A WET PARTING AGENT TOUCHES AN ACRYLIC SURFACE, DAMAGE TO THE ACRYLIC SURFACE CAN OCCUR.
(2)
Apply the parting agent to one of the mating surfaces. If one of the mating surfaces is acrylic, apply the parting agent to the non-acrylic surface.
S 392-020-B00
(3)
When the parting agent is sufficiently dry to touch, apply the sealant to the opposite mating surface.
S 392-012-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.
(4) Apply the sealing compound to one surface with a flow gun or spatula. Make sure you apply the sealing compound on the full area of the faying mated surface (Fig. 201).
NOTE: The thickness of the sealing compound must be 1/32 inch.
____
S 432-081-B00
(5)
Put the component parts together. Install the necessary fasteners.
S 212-082-B00
(6)
If you will seal the fasteners, make sure you install them during the pot life of the sealing compound.
S 492-083-B00
(7)
If you cannot install the permanent fasteners before the pot life of the sealing compound ends, use temporary fasteners to hold the parts together until the sealing compound dries.
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737-300/400/500MAINTENANCE MANUAL
S 392-084-B00
(8)
Install the permanent fasteners with the new sealant. Apply the sealant on the fastener or in the hole.
S 212-085-B00
(9)
Remove the unwanted sealant.
(a) Make sure the faying mated surface is smooth and the squeeze out is approximately 0.06 inch along the joint.
TASK 51-31-00-392-022-B00
5. Injection Seal Application__________________________
A. Equipment
(1) Sealing gun and nozzles
B. Procedure
S 302-023-B00
(1) Do the Prepare for Sealing task.
S 392-024-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.
(2) When a continuous seal is necessary, put a finger or a spatula on one end of the hole to stop the flow of the sealant (Fig. 202).
S 392-025-B00
CAUTION:_______DO NOT FULLY EMPTY A FLOW GUN. ALWAYS APPLY THE SEALANT FROM ONE DIRECTION. DO NOT SEAL A SURFACE FROM THE TWO ENDS OF A HOLE. AIR POCKETS AND POSSIBLE LEAKS IN THE SEAL CAN OCCUR.
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