THRUSH AIRCRAFT INC – MODEL S2R G10
AIRCRAFT MAINTENANCE MANUAL
FUEL STRAINER SERVICE
INSTRUCTIONS
Service the fuel strainer per the following
instructions.
A. Turn airframe fuel shutoff valve to
“OFF” position. Cut, remove and
discard safety wire (not shown)
securing the wing nut on one of the
bowl retaining studs.
B. Unscrew the wing nut until the bowl
retaining bar can be removed. Be
careful not to drop the lower housing
cover.
5-8
C. Remove the lower housing cover and
pull out the fine mesh double filter
screen.
D. Clean and rinse screen free of
accumulated contaminants using
gasoline or other solvent. A
toothbrush or other fine brush may
help dislodge debris.
DO NOT scrape, pry or poke
mesh surfaces with sharp
objects.
E. Inspect and clean fuel filter housing as
necessary.
F. Replace filter screen with the cone
pointing down.
G. Put lower housing cover back in place
and then position the cover retaining
bar. Tighten the wing-nut as tight as
possible with finger pressure only.
H. Secure the wing nut to the filter housing
with .032” stainless steel lock wire.
I. Turn airframe fuel shutoff valve to “ON”
position. Turn fuel boost pump on and
observe 20 PSI on fuel pressure
gauge. Observe fuel filter assembly
for leaks prior to closing filter access
panel.
FUEL SYSTEM MAINTENANCE
AND REPAIR
Polysulfide sealants to AMS-S-8802
(formerly MIL-S-8802) may be used as a
thread seal or to seal minor connection
leaks throughout the fuel system. Apply
sparingly to male fittings only. Make sure
that any sealing compound or residue from
a previous seal, or any other foreign
matter, does not enter the fuel system.
CAUTION
Protect all drain openings
and fuel outlet screens
w
hen applying sealant.
Any structural repair that breaks the fuel
tank integrity will necessitate resealing of
that area of the tank. To the greatest
extent possible, repair parts requiring
sealing should be installed with faying
surfaces coated with “B” type sealant and
rivets or other fasteners installed
immediately.
CAUTION
Fast
eners in the fuel tanks are always
installed wet. That is, their shanks and
under the head is coated with “B” sealant
prior to installation. After installation, some
sealant will have squeezed out around the
ends. Smooth this out and add more to
completely seal the fastener ends as
shown in Figure 5-4. Use a tool or a latex
gloved finger for smoothing, not a bare
finger. Do not clean up excess sealant
with solvent.
USE OF FUEL PROOF SEALANTS
Any sealant that meets AMS-S-8802
(formerly Mil-S-8802) standards is
acceptable for sealing fuel system
components as well as other areas where
contaminant ingress needs to be
prevented. This is a polysulfide fuel
resistant sealant used on integral “wet
wing” fuel tanks as well as other areas
subject to contact with aircraft fuels,
Page Effective: 03/26/2010
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