THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
Effective: 01/01/08
7-23
L. Lubricate the 12 NAS wing splice
attach bolts and the holes in the
splice fittings, (top and bottom
halves) with anti-seize. Position the
upper plate part number 20242-2 on
top of the top splice fitting and insert
the two large NAS bolts with
MS20002C countersunk washers.
Be sure to mate the countersunk
portion of the washer with the head
of the bolt. Insert the remaining 10
NAS bolts in their respective holes
and position all 12 bolts flush with
the bottom of the fitting.
Use extreme care to avoid
damaging the spar cap and
the surface finish of the holes
through the spar cap.
M. Apply anti-seize to the matching
holes in the upper spar cap and
place the top splice fitting into
position. Move the wings as
required and press the bolts through
the holes in the upper spar cap.
N. Place the splice fitting (bottom-half)
into position and press it upward
over the bolts. When bolt threads
are fully exposed, clean threads
thoroughly with acetone or other
non-petroleum solvent and dry.
Install MS20002 (no countersink)
washers (12 places) and bring the
tube nuts (two places) and the
MS21044N nuts (10 places) up snug
but not to full torque.
O. Correctly position the lower plate,
part number 22514-1, on bottom of
lower splice fitting (bottom) and
insert two ¾” NAS bolts with
MS20002C countersunk washers
with chamfer towards the bolts
hexagonal head. Place upper splice
fitting on top of lower spar cap. Use
anti-seize the same as for the upper
splice blocks, but be sure to clean
threads before installing nuts. Push
large bolts through upper splice
fitting and lower spar cap until flush
with lower surface of cap. Install and
snug tube nuts but do not torque.
Install the remaining NAS bolts in the
lower splice fittings starting with the
largest bolts working to the outboard
P. Align the holes in the wing attach
angles (left and right wings) with the
holes in the fuselage vertical wing
attach tubes and install the
remaining seven 5/16 inch AN bolts
with AN960 washers and MS21044N
nuts. Bring the locknuts up snug but
not to full torque.
Q. Torque all locknuts on the NAS ¼
inch bolts through the spar web and
splice plates per Table 7-3, 39
places.
R. Torque the tube nuts and the
MS21044N locknuts on the NAS
bolts through the upper and lower
splice fittings per table 7-3, four
places and 20 places, respectively.
S. The upper and lower tube nuts are
joined together by locking sleeves.
Install sleeves with four each. 5/16
NAS bolts, MS20002C5 chamfered
washers, under the head, AN-960-
516 washers, and MS21044N5
locknuts. Torque locknuts per table
7-3.
T. Remove the ½” temporary spacers
from between the wing spars and the
longerons, two places.
U. Torque
the
locknuts on the AN5 bolts
through the left and right wing attach
angles and the fuselage vertical
tubes per Table 7-3, eight places.
V. Torque
the
locknuts on the AN7 bolts
through the left and right wing rear
spar attach fittings per Table 7-3, two
places.
W. Release the wing jacks and check
the wing dihedral for 3 ½ degrees.
X. Install the spray pump and bracket
and torque all nuts and bolts.
CAUTION
