THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
trunnion assembly. Remove two-(2)
each NAS6606-54 bolts that holds
the lower spring support block to
upper support block. Note how
many 90056-26 washers were
located on each side between
support blocks.
H. Remove trunnion assembly from
fuselage by removing trunnion attach
shaft.
Cleaning, inspection and repair of tail
landing gear
A. Clean all parts with a suitable type
cleaning solvent.
B. Remove, clean, and inspect leaf
spring forward attach P/N NAS6207-
38D bolt every 100 hours. Upon
reassembly lubricate bolt and leaf
spring hole with Snap-on™ General
Purpose Anti-seize or equivalent or
MIL-G-81322 (Aeroshell 22) grease.
Torque to specifications I/A/W
Torque chart (figure 2-7). Replace
MS24665-300 cotter pin each
inspection.
C. Inspect all bolts holes for elongation.
As a general rule, replace
components with holes that are out
of round by 0.005” or more.
Replacement of the leaf spring
forward attach P/N NAS6207-38D
bolt (inspect every 100 hours) with a
larger diameter is not approved. The
leaf spring may not be “drilled out”
for a larger bolt.
D. Inspect main spring leaf for corrosion
and cracks. Check aircraft
maintenance records to be sure
spring leaf P/N 5079-1 has not
exceeded its five thousand (5,000)
flight hour life limit. Replace leaf
spring as needed.
E. Inspect spindle housing assembly
welds for cracks.
F. Inspect spindle housing assembly for
cracks and corrosion.
G. Inspect lock pin and upper and lower
lock plates for wear, corrosion,
cracks, and proper operation.
H.
Inspect centering springs for
corrosion, wear at ends, and for
correct operation.
I. Inspect
lock
pin
flexible cable and
spring for corrosion and correct
operation.
J. Inspect
P/N95207-1 Acetal (Delrin®)
lower support bracket spacer for
wear and cracks.
K. Inspect upper and lower leaf spring
support brackets, and attachment
hardware for wear, corrosion, and
cracks. Ensure that the leaf spring
support blocks grips the leaf spring
tightly to prevent leaf spring
movement fwd. and aft. Ensure
flexible sealant around contact
edges of support blocks, lower
support block spacer and leaf spring
is intact to prevent collection of
potential corrosive material in this
area. Lubricate 2 ea. Trunnion Zerk
(grease) fittings with MIL-G-81322
(Aeroshell 22)
L. Repair of the tail landing gear is
limited to replacement of component
parts such as bearings & bushings,
smoothing out minor nicks and
scratches and repainting chipped or
peeled paint.
TAIL LANDING GEAR INSTALLATION
Ensure that trunnion is straight down (6
O’clock position) and that leaf spring
support blocks grips the leaf spring tightly
to prevent movement fwd. or aft. (Add or
subtract P/N 90056-26 washers/spacers
(.063”) between upper and lower support
blocks to achieve a tight grip of leaf
spring after bolts are properly torqued.)
All bolts shanks and bolt holes are to be
coated with Snap-on™ General Purpose
Effective: 01/01/08
6-13
