Repair of Large Single Skin Puncture or Cut (cont).
Size the block insulation or cutout to fit the opening where the skin and foam
were removed. If a cutout is used, remove the aluminum skin from one side of
Remove all paint or foreign matter from the overlap area on the skin of the
shelter and an area approximately one inch around the scribed mark using emery
cloth and cleaner. If the cutout is used, remove all paint or foreign matter from
the aluminum skin of the cutout.
Roughen the skin surface with coarse grit emery cloth. If a cutout is used,
roughen the surface of the aluminum skin.
Coat the interior of the opening where the skin and foam core were removed
with mixed adhesive (paragraph 47.b.(4)).
Insert the block insulation or cutout into the opening where the skin and foam
core were removed (D, Figure 45).
With the aluminum patch over the puncture area, drill #30 holes, around the
perimeter of the patch, 1/2 inch from edge of patch and on one inch centers.
Coat the exposed block insulation or cutout and the overlap area with mixed
Dip the pop rivets in the mixed adhesive and use the riveting tool for pop rivets
to install the aluminum skin patch as shown (E, Figure 4-5).
Smooth and taper mixed adhesive (squeezed out during the riveting process)
along the edges of the aluminum skin patch and immediately remove excess
mixed adhesive with cloth saturated in toluene solvent.
Prime and paint the repaired surface. (Refer to paragraph 4-12,)
Inspect the repaired area to ensure that rivets and paint were applied correctly.