Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual page 165

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
F. Remove the ¼ inch bolts securing the left and right wing, inboard and outboard
attach angles to the spar webs, 12 places on each wing.
G. Back the locknuts off of the NAS bolts in the splice fittings far enough to conceal
the end of the bolt threads. Spray the bolt shanks with WD-40 or an equivalent
lubricant.
H. Remove the eight each ¼ inch bolts securing the two each U-shaped Clevis (part
number 22506-11) to the tube nuts and remove the two clevises (See Figure 7-
16). Loosen the lower splice fitting tube nuts. As the nuts are loosened, the bolts
will back out of the holes. Once the tube nuts are off of the lower bolts, loosen the
upper tube nuts to back them out of the holes. If one of the bolts does not move,
rethread the tube nut onto this bolt and place a spacer between the opposite end
of the tube and the spar cap (or NAS bolt). Proceed, once again, to loosen the
tube nut and back the bolt out of the hole. Remove tube nuts after obtaining
sufficient clearance.
Observe extreme care to avoid damaging the spar cap and
the surface finish of the holes through the spar cap.
Adjusting the angle of the wings with the wing jacks may
assist in wing bolt removal.
I. Place an aluminum block on the smallest nut and with a 4X rivet gun, drive the nut
flush to the lower splice fitting. Proceed in a similar manner with the remainder of
the bolts working from the smallest to the largest.
J. Remove all of the nuts and tube nuts from the lower NAS bolts.
aluminum block on the threaded end of the smallest bolt and with the 4X rivet gun,
drive it flush with the lower splice fitting. Proceed in a similar manner with the
remainder of the bolts working from the smallest to the largest.
K. Using a suitable phenolic or soft metal drift, drift out the NAS bolts from the lower
splice fittings and lower spar cap with a 2X rivet gun working from smallest size
bolt to largest size.
L. Pry the lower half splice fitting off the NAS bolts by tapping phenolic, hard plastic
or aluminum wedges between the lower splice fitting and the lower spar cap.
Remove the lower half of the lower splice fitting. In a similar manner, remover the
upper half of the lower splice fitting.
M. Place the aluminum block on the threaded end of the smallest bolt in the upper
splice fitting and with a 4X rivet gun, drive it flush with the spar cap. Proceed in a
similar manner with the remainder of the bolts working from the smallest to the
largest.
7-14
AIRCRAFT MAINTENANCE MANUAL
** CAUTION **
*NOTE *
Place the
Effective: 9/16/05