Thrush Aircraft S2R-R1340 Maintenance Manual page 117

THRUSH AIRCRAFT, INC – MODEL S2R R1340
If you haven't worked with this material
before, understand that it is a two-part
mixture that must be mixed properly,
according to the
instructions. It is available with working
life of from ½ hour to 4 hours, and you
generally want to give yourself as much
working life as possible. It also comes in
two consistencies, "A" being thin enough
to paint on, and "B" being thicker and
requiring spreading on with a tool. They
are available in bulk or in several sizes of
kits that contain the proper proportions of
the two materials and require only
thorough mixing.
WARNING!
Refer to and adhere to all
measures and
obtained from the applicable
Material Safety
(MSDS) prior
removing fuel proof sealer and
any other chemicals, adhesives,
oils, fuels, sealers, cleaners, or
solvents listed in this manual.
When needing only small amounts of
sealer, bulk material is the more cost
effective way to
manufacturer's instructions thoroughly.
Generally a lot more of one part is used
than the other. Use a clean, smooth, flat
non-porous surface to mix the sealer on,
about twice as big as you think you will
need. Start by measuring out the part
used in larger proportion
approximate end amount needed. Then
measure out the proper proportion of the
other constituent material on top of the
first one. Mix and stir both components
until a uniform gray color is achieved.
There should be no white or black
Effective: 01/01/08
AIRCRAFT MAINTENANCE MANUAL
manufacturer's
precautions
Data Sheet
to using or
go. Read the
in the
streaks in the properly blended material.
Blend the components slowly, as violent
stirring will entrap air in the cured
sealant. Do not thin the sealant with
solvents.
Thoroughly clean all surfaces to which
the sealant is to be applied immediately
prior to sealant application.
should be accomplished with clean, lint-
free paper or cloth towels or small
paintbrushes soaked with Acetone or
Methyl Ethyl Ketone (MEK) and wiped
clean. Do not let the solvent dry on the
surface, but instead wipe it off before it
dries. Always clean an area longer and
wider than the width of the finally applied
sealant to ensure no contamination.
Fuel proof sealant is also used by Thrush
Aircraft, Inc. to seal all exposed stressed
skin fillet joints and faying (face to face)
seals, fiberglass to aluminum fillets and
to seal cockpit windows.
sealing prevents water and corrosive
chemical entry into these vital structures.
Fuel proof sealant is used to seal all bolts
and carry-through
chemical hopper. A one part sealant to
Mil-S-4383C may be used as a topcoat
over polysulfide fuel proof sealers inside
of the integral fuel tanks.
consistency of thin syrup and can be
painted on top of all previously sealed
internal fuel tank seams. If it is used, it
must be allowed to air dry for 4 days
minimum before being exposed to fuel.
Alternatively, a long curing type A fuel
proof sealer to AMS-S-8802 can be
painted on as a top coat. Either way, the
"wet wing" fuel tanks must be finished
with a topcoat over the repair and a
minimum of 6" around it.
Cleaning
This extra
structure in the
It has the
5-9