Center Section; Wing; Empennage - Thrush Aircraft S2R–T660 Maintenance Manual

THRUSH AIRCRAFT INC – T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
fuselage is covered with heat treated Alclad panels attached with camloc fasteners. Side skins can
be removed using only a screwdriver, thus exposing the fuselage frame for thorough cleaning and
inspection. All skins are supported clear of the fuselage tubing to prevent accumulation of corrosive
chemicals. The seams and lap joints of the skin panel support structure are sealed with a special
compound to eliminate chemical action between the mating surfaces. Each skin panel is etched,
primed, and painted before assembly to insure complete coverage. All lower fuselage skins around
the hopper opening and aft to the tail post are made of stainless steel. The skin fasteners in the
high corrosion areas are also stainless steel.

CENTER SECTION

The Center Section is a constant chord of 90 inches, all metal, and full cantilever design. The
massive main spar is of a one piece design of high strength heat treated steel and machined to
reduce weight. The spar is cad plated, primed and painted. All metal skins and ribs are constructed
from Alclad heat-treated aluminum material. The unit attaches to the fuselage and supports the
wings.

WING

The wing is a constant chord of 90 inches, all metal, and full cantilever design. The massive main
spar is a tension field beam structure constructed from Alclad webs and high strength heat-treated
steel caps. All wing skins, ribs, and leading edges are constructed from Alclad heat-treated material.
The leading edge structure is made especially strong to minimize denting and is riveted with
universal rivets for strength. The fuel tanks, which are located in the inboard section of the wing, are
an integral part of the structure. Close pitch riveting of the seams, substantial reinforcement, and
flexible sealants minimize chances of rupture in crash conditions. Drain holes are provided in
adjacent bays to prevent accumulation of fuel in the event of a leak. The ailerons and flaps are all
metal construction and are hinged on ball bearings. The flaps are electrically operated by push rods
and are completely sealed against chemical entry. Flap hinges are stainless steel. For the Model
S2R-T660, the outer wing panel detaches from the center wing panel by removal of four bolts.

EMPENNAGE

The horizontal stabilizer, elevator, rudder and vertical fin are an all-metal structure. All skins, ribs
and leading edges are constructed from alclad material. The movable surfaces are hinged on
sealed bearings that can be easily replaced. The rudder and the elevator have aerodynamic
balances that are protected by overhangs on the fixed surfaces.
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Effective: 12/17/03