THRUSH AIRCRAFT, INC – MODEL S2R-G10
AIRCRAFT MAINTENANCE MANUAL
7-21
On all NAS bolts described
hereinafter, insure that at
least two bolt threads are
showing beyond the edge of
the fiber locknut and that the
nut has not bottomed-out on
the bolt threads.
C. On the left wing, install the center
splice plate if removed, to the spar
web and install the 3/16” and ¼”
bolts and c/s screws, AN960 and
MS20002C washers and MS21042
nuts per Figure 7-12. Torque the
nuts per Table 7-3, 152 places.
D. Elevate the left wing and place it in
position. Place a ½” aluminum or
phenolic spacer between the
fuselage longeron and the lower spar
cap. Butt the wing attach angle
squarely against the fuselage vertical
wing attach tube assembly. Slide
the rear spar attach fitting into the
fuselage attach fitting and install the
7/16” AN7-21A bolt, AN960-716
washers under bolt and nut, and
MS21044N7 nut. Bring nut up snug but
not to final torque.
CAUTION
E. Support the wing at the wing jack point
on the front spar, approximately 8 feet
inboard of the wing tip, and under the
inboard end rib.
F. Rest the inboard end of the main spar
on the lower longeron with a ½ inch
temporary spacer between.
G. Install the left wing inboard attach angle
on the main spar web with with
NAS1104-16 bolts, MS20002C washers,
AN960-416 washers and MS21042-4
nuts (See Figure 7-13). Torque the
locknuts per Table 7-3, 6 places.
H. Align the bolt holes in the wing attach
angles with the bushings in the fuselage
vertical wing attach tube. Install one
5/16” AN bolt in the top hole and secure
with an AN960 washer and AN365
locknut. Install locknut finger tight.
Effective: 03/26/2010 Page
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