Modified Wing Installation Procedure For S2R Aircraft Which Have To Have The Wing Attach Angles Replaced - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
NAS1104-26 bolts, MS20002C4 chamfered washers, under the head, AN-960-416
washers, and MS21044N4 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 2-7, eight places.
V. Torque the locknuts on the AN7 bolts through the left and right wing rear spar
attach fittings per Table 2-7, 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.
Y. Complete the wing installation by making the necessary connections in the
electrical, fuel, pitot, and flight control systems.
Z. Reconnect the batteries.
MODIFIED WING INSTALLATION PROCEDURE FOR S2R AIRCRAFT WHICH HAVE
TO HAVE THE WING ATTACH ANGLES REPLACED.
A. With the wings supported, position the wing roots in the fuselage and place a ½
inch temporary spacer between the lower longeron and the main spar cap of each
wing. (This will properly set the wings angle of incidence.)
B. Install the spar web splice plate and the upper and lower main spar cap splice
fittings in accordance with the normal installation procedure. Torque all nuts to
specification.
C. Install the wing attach bolts at the left and right rear spars and torque to
specification.
D. On the 20243-3 wing attach angles (outboard only), draw heavy black line from top
to bottom so as to bisect the area of the forward face when it is positioned on the
aircraft. This line will be on the outside of each angle and will mate with the back
side of the main spar web.
E. Position these outboard angles so that they mate flush with the bushings through
the vertical fuselage tube, flush with the spar web and contact the top of the lower
spar cap. Now raise the angle so that there is approximately a 3/16 inch clearance
between the angle and the spar cap. Clamp the angle to the vertical fuselage
member.
F. Sight through the bolt holes in the main spar web and position the wings so that
black lines drawn in step "D" are visible and that they appear symmetrical between
left and right wings. This centers the wings with respect to the fuselage. Repeat
step "E" if the 3/16 inch clearance has changed.
G. Transfer the location of each of the holes through the vertical fuselage member to
the attach angle by sliding a 5/16 inch drill bit (preferably one that has a pilot tip),
through each of the four holes in succession. Do not drill these holes because
edge distance must be checked.
7-18
AIRCRAFT MAINTENANCE MANUAL
(See Figures 7-14, 7-15, 7-16 & Table 7-1)
Effective: 5/05/04