THRUSH S2R – G10 Maintenance Manual page 85

escape. Tighten the plug when fuel
comes out around it.
G. Slowly add additional fuel to each wing
tank until the forward fuel outlet ports
are just covered with fuel (rear outlet
ports will be covered first). If one wing
tank reaches this condition before the
other, level the airplane laterally so
that forward outlet ports in both wings
are barely covered at the same time.
* NOTE *
Because both tanks feed the
header tank, fuel will cross-feed
when there are different amounts
of fuel in
Therefore, give the tanks some
time to equalize after fueling the
second tank.
H. Connect an APU (auxiliary power unit)
to the external power connector.
I. Turn APU on and adjust to 27.5 volts.
J. Turn battery switch ON. Readjust APU
to 27.5 volts, if necessary.
K. Place fuel quantity selector switch to
L.H. fuel tank.
L. With the transmitter float free to float on
the unusable fuel in the tank, center
the indicator needle on the "0" mark by
adjusting the trimmer screw on back of
TABLE 5-1: TANK CONTENTS VS. REQUIRED INDICATOR READING
FUEL IN
Unusable 20 Gallons 40 Gallons
TANK
INDICATOR
0
READING
5-6
Page
THRUSH AIRCRAFT INC – MODEL S2R G10
AIRCRAFT MAINTENANCE MANUAL
the two wings.
20 (-3, +5) 40 (-3, +5)
the indicator.
M. Switch the fuel quantity selector switch
to the R.H. fuel tank and repeat
procedure K for the right hand tank.
N. If the left and right "0" indications are
different, adjust the indicator to the
lowest one.
O. Replace the inboard fuel tank access
cover on both wings.
P. Fill both fuel tanks with 20 gallons of
fuel. Ascertain that the fuel quantity
indicator for both tanks reads within -2
to +3 gallons of the center of the "20"
mark. For reference, the width of the
"20" mark represents approximately 3
gallons.
Q. Fill both fuel tanks with an additional 20
gallons of fuel. Ascertain that the fuel
quantity indicator for both tanks reads
within -2 to +3 gallons of the "40"
mark.
R. Repeat step R. for the "60" and "80"
gallon marks. Ref. Table 5-1.
S. Turn off and disconnect the APU.
T. Turn battery switch OFF.
U. Watch the fuel tanks, hoses and
header tank for a while to be sure
there are no fuel leaks.
60 gallons 80 gallons
60 (-3, +5) 80 (-3, +5)
Greater than
82 gallons
82 (-3, +5)
Effective: 03/26/2010