Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual page 170

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
H. Remove the angle and check to confirm that the mark for the bottom hole is at
least 5/8 (2X hole diameter) inch away from the edge of the angle. If it is not, file
the bottom edge of the angle which comes into contact with the lower spar cap in
such a manner as to allow the angle to be lowered and yet provide clearance with
the lower spar cap. Repeat the hole transfer procedure and recheck for edge
distance.
I. Drill the four 5/16 inch holes through the outboard wing attach angles.
J. Place the inboard attach angles back to back against the outboard angles. Align
and clamp the two angles and transfer drill the 5/16 inch holes through the inboard
angles.
K. Temporarily install the four wing attach angles to the fuselage down tubes and
torque the 5/16 inch nuts and bolts to specification.
L. Again sight through the ¼ inch bolt holes through the main spar web and confirm
that the black lines appear symmetrical between the left and right wings.
M. Transfer the location of the ¼ inch holes to the four wing attach angles, using the
main spar web as an index. A few holes may be drilled and bolts installed to keep
the spar web flush with the forward face of the angles for transfer accuracy. Use
caution not to enlarge the holes through the spar web.
N. Remove the four attach angles and drill and ream the ¼ inch holes at the marked
locations with a drill press or milling machine (.250"/.254"). Debur all holes.
O. Reinstall the wing attach angles and torque all nuts and bolts to the specification
called out in Figure 2-7.
P. Remove the ½ inch temporary spacers between the lower longeron and the lower
spar cap.
Q. Release the wing supports and check the wing dihedral for 3 ½ degrees.
R. Complete the wing installation by making the necessary connections in the
electrical, fuel, pitot, and flight control systems.
Effective: 5/05/04
AIRCRAFT MAINTENANCE MANUAL
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