THRUSH AIRCRAFT, INC – MODEL S2R-G10
AIRCRAFT MAINTENANCE MANUAL
Figure 9-1: 510 Gallon Hopper
B. If damage consists only of surface
cracks, excessive abrasion or
chemical erosion, sand all affected
surfaces smooth. Extend the
prepared surface six inches beyond
the damaged area.
C. If damage consists of cracks or holes
extending completely through the
wall, sand the surfaces on both sides
deep enough to expose the first layer
of cloth.
D. Surface damage requires repairs
only to the eroded or cracked side.
Damage extending through the wall
requires repairs to both the inner and
outer surfaces of the hopper. The
number of layers in either case
should equal the original basic wall
thickness. (Figure 9-1) Highly stressed
areas, such as attach points, require an
extra layer of cloth and mat on each
side, in addition to the basic wall
thickness.
E. Curing temperature is 70F minimum.
Higher temperatures accelerate curing.
A maximum of 150F for four hours is
recommended followed by ten or more
hours at 70F.
F. Brush the resin generously over the
entire area. Apply alternate layers of
fiberglass cloth and mat. Each layer
should overlap the preceding layer
approximately one inch. After each
layer is in place, use a squeegee and/or
roller to remove excess resin and air
voids.
Effective: 03/26/2010 Page 9-3
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