CHAPTER 57
PAGE 8
PAGE DATE: 21. March 2014
MAINTENANCE MANUAL EXTRA 300LT
I M P O R T A N T If there is clearance between the main spar and the at-
tachment brackets (1, Figure 2), use shims (3) like
shown below which are to be slided in the front gaps
(2).
Figure 2 Shims Installation
8 Slide in shims if necessary and install the main spar tubular
bolts (4, figure 3) to the wing flange bushings (11) from
front to rear.
9 Secure main spar tubular bolts with bolts (2), DIN912 M8
and aluminum 30x11x4 washers. Torque security bolts for
fastening and subsequently safety wire.
10 Install upper longeron cutout bridges (7) using at each side
3x DIN912 M8 x 180, 3x DIN125 M8 washers and 3x
LN9348-08 stop nuts at the top and 1x DIN912 M10 x 230
bolt, DIN125 M10 washer and LN9348-10 stop nut at the
bottom (6). Check cutout bridges for RH and LH marking.
Install the bolts (except the upper outer bolts, see figure 3,
detail A) from front (firewall) to rear (aircraft tail). Torque
stop nuts for fastening.
11 Install the shear connectors (8). Use two DIN 912 M12x220
bolts and safety wire.
12 Reinstall the front canopy hinge.
13 Reinstall RPM-Vernier-control and adjust.
14 Unfix throttle lever and control sticks.
MAINTENANCE PRACTICES
Wing
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