Thrush Aircraft S2R–T660 Maintenance Manual page 101

THRUSH AIRCRAFT INC - T660 TURBO THRUSH
D. Set condition lever (Fig. 4-3, #5) at LO-IDLE and install rig pin. This setting is a rigging
datum point.
E. Set FCU arm (Fig. 4-3, # 10) on FCU speed setting shaft (Fig. 4-7) maintaining an angle of
45 degrees as shown.
F. Adjust interconnect rod (Fig. 4-3, # 6) to length of 8.25 +/- .0625 inches between terminal end
centers and using the outboard hole in FCU arm (Fig. 4-3, # 10) and 2
top of FCU actuating lever (Fig. 4-3, # 11), install interconnect rod.
G. Place power control lever (Fig. 4-3, # 7) at Beta and reverse lockout stop and install rig pin into
FCU actuating lever (Fig. 4-3, #11) with cambox input lever (Fig. 4-3, # 3) slightly forward of
vertical, connect power lever control cable (Fig. 4-3, #4) to inboard hole on cambox input
lever (Fig. 4-3, #3).
H. Remove the rig pin from the cambox (Fig. 4-3, #2) and operate the power control lever (Fig. 4-3,
#7) throughout its forward operating range. Observe that the FCU hits the FWD MAX STOP
and returns to the ground idle position when the power control lever is fully advanced with
FCU on FWD MAX STOP, ensure that:
1.
2.
I. Select MAX REVERSE with power control lever (Fig. 4-3, #7) and verify that FCU MAX
REVERSE STOP (Fig. 4-7) is contacted before power lever reaches rearward extremity of
control quadrant travel. Allow slight "cushion" at the end of lever travel.
J. To check deadband, place protractor on cambox input lever (Fig. 4-3, #3).
K. Retard power lever (Fig. 4-3, #7) into REVERSE range as far as necessary in order to get the
FCU lever (Fig. 4-3, #10) to move off of the deadband stop. Slowly move the power lever
(Fig. 4-3, #7) forward until the deadband adjustment screw (Fig. 4-7) hits the stop. The
screw should be against the stop until a piece of paper between the screw and the stop is
held tightly and a further motion in the REVERSE direction will release the paper.
L. Measure the angle of the cambox input lever (Fig. 4-3, #3).
M. Push the power lever (Fig. 4-3, #7) forward to the point where the stop screw is about to liftoff
of the stop, but will slightly still grip the piece of paper tightly.
N. Measure the cambox input angle. The difference between the two angle measurements should
be 11 to 12 degrees. Adjust the deadband stop screw (Fig. 4-7) to obtain the desired
deadband travel. One full turn out of the deadband adjustment screw will widen the
deadband 1.32 degrees.
Effective: 12/17/03
AIRCRAFT MAINTENANCE MANUAL
Cam follower pin is clear of bottom of cam track.
FCU reaches FWD MAX STOP before cockpit power lever reaches its
forward extremity of control quadrant travel. There should be a slight
"cushion" at the end of lever travel.
nd
hole down from the
4 – 28