TM 10-5411-201-14
T.O. 35E4-178-1
4-40.
(cont)
j.
Layout and drill 1/8 inch (3.18 mm) diameter holes in patches.
k.
Position bonded sandwich panel in cutout opening.
1.
Center patches, one on each side of panel, over cutout opening.
m.
Drill No. 30 (3.27 mm) diameter holes in panel skins and bonded
sandwich panel with patches as templates.
n.
Mark each patch outline on panel skin, and sand all paint from panel
skin within marked area with sandpaper (Item 17, Appendix E).
o.
Index each patch and panel skin with a mark to allow patches to be
replaced with same orientation.
p.
Remove patches and bonded sandwich panel.
q.
Deburr drill holes and sand all paint from panel skin within marked
areas.
r.
Clean loose core material, dust, and chips from cutout opening.
s.
Wipe panel skin within marked areas, two patches, and bonded
sandwich panel metal skin with a clean cloth dampened with solvent.
Immediately wipe solvent from surfaces with a clean, dry cloth.
t.
Mix sufficient amount
instructions.
u.
Apply a thick coat of
opening, bonded sandwich panel,
of adhesive in accordance with manufacturer’s
adhesive to inside surfaces of panel cutout
and two patches.
v.
Position bonded sandwich panel in cutout opening.
w.
Fill any gaps between cutout opening and bonded sandwich panel with
adhesive.
4-177
