Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual page 115

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
PROBLEM
No fuel quantity Left and right fuel
indication. quantity indicator switch
(Continued) defective.
No power to gauge.
Power, ground and
transmitter checks
good.
Fuel indicated Open ground between
full at all times. gauge and transmitter.
No fuel flow to
engine-driven Fuel tanks empty.
fuel pump.
Fuel line disconnected
or broken.
Header tank outlet fuel
strainers plugged.
Fuel filter element
plugged.
Fuel line plugged.
Fuel starvation Partial fuel flow from the
after starting. preceding causes.
Malfunction of engine-
driven fuel pump.
Fuel vents plugged.
No fuel flow
Defective electric
when auxiliary
auxiliary fuel pump
pump is turned
switch.
on.
Effective: 5/05/04
AIRCRAFT MAINTENANCE MANUAL
PROBABLE CAUSE REMEDY
Check continuity and replace if defective.
Check power to gauge. If no power,
check for defective circuit breaker.
Circuit board on rear of gauge defective.
(Replace board) or entire gauge.
Check ohms to transmitter. Check for
broken wire. Transmitter should read 0
ohms when fuel tank is empty and 33
ohms when fuel tank is full.
Check fuel quantity. Service with proper
grade and amount of fuel.
Inspect fuel lines. Connect or repair fuel
lines.
Disconnect fuel lines from tank outlets.
No fuel indicates plugged strainers.
Remove and clean strainers and flush
out tanks.
Inspect filter element. Clean or replace
filter element.
Starting at fuel pump inlet, disconnect
fuel lines successively until plugged line
is located. Clean out or replace fuel line.
Use the preceding isolation procedures,
checking for sufficient rate of flow. Using
the preceding remedies.
Check pump outlet during starting.
Replace fuel pump. See Section IV.
Pressure check each vent line. Clean or
replace vent line.
Check continuity of switch. Replace
defective switch.
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