Flap Jackscrew Removal - Thrush Aircraft S2R-R1340 Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2R-R1340
WING FLAPS
Ref. Figure 7-5
Wing flaps installed on the S2-R1340 are
of all-metal construction similar to the
ailerons. Each flap spans from the
fuselage to the aileron and is attached to
the aft wing spar by three (3) 4130 steel
hinge brackets with ball bearing hinge
points. The flaps have been completely
sealed against chemical spray. A switch
located on the aft side of the throttle
quadrant electrically controls the flap
operation. An electric motor-driven
jackscrew below the cockpit floor rotates
a torque tube. Push rods attached to
arms at each end of the torque tube
move both flaps to the desired position
simultaneously.

FLAP JACKSCREW REMOVAL

A. Remove left side fuselage skin at
cockpit and hopper.
B. Remove wing root fairings to gain
access to the flap push road and
jackscrew attach bolts.
7-8
AIRCRAFT MAINTENANCE MANUAL
Figure 7-4: Aileron Assembly
C. Disconnect each flap from the push
rod and allow flap to swing and hang
under wing.
D. Disconnect
connections, connecting the micro-
switches and motor.
wires and locations for installation
reference.
E. Remove one attach bolt at the motor
end, loosen the other bolt slightly
and remove the four bolts connecting
the jackscrew to the flap torque tube.
F. Install new flap jackscrew assembly
into fuselage and connect with
hardware which was removed or
new hardware.
*NOTE*
Rigging must be checked after
installation of new jackscrew
or pushrods.
rigging.
G. Reconnect the electrical wires and
test flap motor for proper operation.
H. Connect pushrods and after flaps are
rigged properly ensure that all bolts
are tight and wires are tied off.
I. Reinstall fairings and side skins.
the electrical
Identify the
Refer to flap
Effective: 01/01/08