Wing Flaps - Thrush Aircraft S2R–T660 Maintenance Manual

Assure the ailerons are attached and the system push tubes are assembled, except for the two lateral push
rods in the fuselage. Ensure that flaps have been rigged. Rig the ailerons as follows:
A. Clamp the ailerons at the trailing edge of the wing tip in the neutral position. Ailerons are in neutral
when ailerons are 1/8" below flap trailing edge.
B. Adjust the length of the push rod from aileron outboard wing bellcrank until inboard wing bellcrank is
perpendicular to the rear spar, both sides. This can be checked through the inspection holes just
forward of the rear spar.
C. Attach the lower, lateral fuselage push rod between the left fuselage idler bellcrank and the right
fuselage bellcrank, adjusting the length of the rod to fit those items.
D. Install the upper, lateral fuselage push rod from right fuselage bellcrank to control stick torque-tube
fitting. Adjust the length of this push rod to center the control stick.
E. Clamp control stick in center position and free clamps on aileron. Set trailing edges of ailerons
0.125-inch below trailing edge of flap trailing edge by lengthening push rod from aileron to outboard
wing bellcrank.
F. Adjust and lock the aileron stops, accessible through the inspection holes forward of the aileron, for
the required travel. Aileron up travel should be 21 (±1) degrees and down travel should be 17 (±1)
degrees.
G. Go back through system and lock all check nuts.
H. To adjust the springs in the rudder-aileron interconnect system, clamp the rudder and ailerons in the
neutral position and adjust the turnbuckles until the springs are the same length.
AILERON SERVO TRIM TABS
A variable position trim tab is attached to each aileron. A wing high attitude of either wing may be corrected
by adjusting the applicable trim tab down. Adjusting the tab up will correct a low wing attitude.
A. Electric Aileron Trim Tabs. Thrush Aircraft Inc has made available an electric aileron trim tab
normally installed on left aileron. Initially, the tab is rigged the same as servo-trim tabs, then the
tab can be electrically adjusted to obtain level flight. Compensating for the wind and in normal
turns, the tab will act as a servo-tab.

WING FLAPS

Wing flaps installed on the T660 are of an all-metal construction and hinged on ball bearings. Each
flap extends outboard from the fuselage to the aileron and is attached to the aft wing spar by four (4)
7 - 5
THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
Effective: 01/10/05