THRUSH AIRCRAFT, INC – MODEL S2R-G10
AIRCRAFT MAINTENANCE MANUAL
aircraft exterior and interior is highly
recommended. During the working season
cleaning intervals should never be more
than a week.
Clean the aircraft prior to performing any
inspections on the airframe or engine.
Before removal of detachable skins,
fairings, and cowlings wash all exterior
surfaces of the aircraft with plain water and
any commercial soap or detergent. Soap
and detergent are organic chemicals and it
is important that all traces be removed by
flushing with plain water.
2-27
*NOTE*
Certain chemicals cannot be
removed effectively by detergent
solutions. Special cleaning agents
are available for that purpose. Be
careful, however, that they will not
harm the corrosion protection
properties of the finish. It is
suggested that chemical suppliers
be contacted for cleaning agents
that are suitable for those special
needs.
A regular and thorough cleaning of both
the interior and exterior of the aircraft is a
major part of corrosion control. All areas of
the aircraft are accessible for cleaning by
removal of the panels. The cleaning
procedure that follows is recommended for
general purposes.
a. Wash all exterior surfaces of the
aircraft with plain water and any
commercial soap or detergent. Soap
and detergent are organic chemicals,
and it is important that all traces be
removed by flushing with plain water.
b. Detach all removable panels from the
aircraft. Wash down the rear fuselage
aft of the wing trailing edge. Tube
joints, skin bends, and so forth should
receive particular attention. Remove
excess moisture after flushing.
c. The forward fuselage and engine
section should not be cleaned with
water unless close attention is made to
avoid removal of lubricants and to
avoid possible rusting of components
and hardware. A general purpose,
non-corrosive cleaning agent, such as
PD-680, mineral spirits or Safety
Kleen, is preferred in those areas.
d. Particular attention should be given to
the wing center splice fittings and the
attachments of the oil cooler, hopper
and engine mount.
e. Hopper cleaning should be
accomplished at the end of each
working day. A good commercial
detergent should be used and followed
by a thorough flush with water. Leave
the hopper door and gate open for
thorough drying.
PAINTED SURFACE REPAIR: The
aircraft exterior is painted with ultra gloss
polyurethane. The forward upper glare
shield part is painted over with flat black
polyurethane. The fuselage frame is
painted with a primer, and then painted
with a gray Ultrathane.
All repairs involving refinishing should be
painted to the original specifications. The
following procedures should be carried out
step by step.
a. Sand part to bare metal using 180 grit
or finer emery paper or wet-or-dry
paper. Avoid removal of cladding with
the Alclad parts, whenever possible.
b. Thoroughly clean area with isopropyl
alcohol, a solvent, or thinner. Remove
this cleaning agent before it dries with
a clean dry cloth so that no oily film
remains.
c. Apply one thin spray coat of Epoxy
primer with Epoxy hardener. Allow
time to dry.
d. Mix the required quantity of
Polyurethane (follow the directions on
the can) with the prescribed amount of
activator. Spray a smooth and even
Effective: 03/26/2010 Page
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