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A 737-300/400/500MAINTENANCE MANUAL
(d) Remove the solvent before it becomes gas with the specified cloth.
S 348-006
(5) Prepare the fiberglass cloth.
(a)
Cut six pieces of fiberglass cloth with these dimensions: 1) Cut the smallest piece of fiberglass cloth to make sure the edge of the cloth is a minimum of 1-inch from the defect.
2) Cut five more pieces and make sure each piece is 0.80 inch larger than the piece you cut before.
(b)
Cut a piece of fiberglass cloth long enough to wrap completely around the duct and make an overlap of 0.80 inch on the six pieces under it.
(c)
Cut one more piece of fiberglass cloth long enough to wrap completely around the duct and make an overlap of 0.80 inch on the largest piece under it.
S 348-007
(6) Prepare the two part resins BMS8-301, Class 3 with the manufacturer's instructions.
NOTE: The amount of resins necessary to soak the fiberglass
____ cloth is approximately equal to the weight of the dry fiberglass cloth.
S 348-008
(7)
Soak the pieces of fiberglass cloth in the resins.
S 348-009
(8)
Put each of the pieces of the fiberglass cloth between two pieces of PVC parting film.
S 348-010
(9)
Apply the BMS8-301, Class 3 resins on the repair area.
S 348-011
(10)
Remove the parting film from one side of the smallest piece of the patch and put that side against the repair area.
S 348-012
(11)
Use a squeegee on the parting film on the top of the patch and remove wrinkles and air from the repair.
(12)
Remove the parting film from the first piece of the patch installed.
S 348-013
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737-300/400/500MAINTENANCE MANUAL
S 348-014
(13)
Remove the parting film from one side of the smallest piece of fiberglass cloth not installed.
S 348-015
(14)
Put this piece of the patch against the repair area with a minimum of 0.80 inch of overlap.
S 348-016
(15)
Use a squeegee on the parting film on the top of the repair area and remove wrinkles and caught air.
S 348-017
(16)
Install the subsequent six pieces of fiberglass cloth as shown in Figure 801 and as specified in the steps before this step.
NOTE: On the last two pieces of the patch, wind the two pieces
____ completely around the ram air duct. Use adhesive tape to attach the last two plies.
S 348-018
(17)
Install a piece of parting film on the top of the full patch to make sure you have an overlap of 0.50 inch on the edges of the patch.
S 348-019
(18)
Push the unwanted resins to the edges of the parting film to smoothly connect the edges of the patch to the contour of the repair surface.
S 348-020
(19)
Make sure that all loose threads of fiberglass cloth are in the adhesive.
S 348-021
(20)
Remove all unwanted resins that has been pushed out at the edges of the parting film.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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A
737-300/400/500MAINTENANCE MANUAL
S 348-027
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