REPAIR INSTRUCTIONS USING FIBER GLASS MATERIAL
6.
Apply the mat and cloth patches, pressing the
laminations
down
tightly
with
a
sheet
of
polyethylene film to produce a tight bond (Figure
48). (The closest patch is installed last.)
NOTE - When repairing large holes, place the
entire patch (including plyethylene film) as
prepared in Step 5, on the repair surface and
press the patch onto the metal. Leave the
polyethylene film as a cover over the patch
until the resin has cured (Figure 49).
Figure 48. - fiber Glass Mat and Cloth Patch Installation
Figure 49. - Applying fiber glass Patch
7.
Allow the material to cure. Then, peel off the
polyethylene film if it was not removed earlier.
8.
Sand and file surface after the patches have
cured.
9.
To complete the repair, use the procedure for
surface filling and Finishing (page 15.
Repair Using Metal Insert
1.
Perform the steps listed under Preparation
Procedure (page 5).
2.
Using the appropriate tools, cut the rusted or
damaged material from the panel.
3.
Using an air hammer and a panel crimper, form
a step in the original panel so that the new sheet
metal or aluminum insert will set flush with the
original panel (Figure 50).
Figure 50. - Forming Insert Step in Original Panel
4.
Cut a new sheet metal or aluminum insert to fit
within the step area of the panel being repaired.
5.
Attach the insert to the original panel by spot or
tack welding it in place or by securing it with pop
rivets (Figure 51).
NOTE - If pop rivets are used, countersink
the holes in the insert so that the rivet heads
when installed are near flush with the
exterior surface of the insert.
Figure 51. - Panel Metal Insert Attachment.
CTS-4049
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