THRUSH AIRCRAFT, INC – MODEL S2R G10
AIRCRAFT MAINTENANCE MANUAL
Effective: 3/26/2010 Page 5-15
TABLE 5-2: FUEL SYSTEM TROUBLE SHOOTING CHART (Continued)
PROBLEM PROBABLE CAUSE REMEDY
Fuel starvation
after starting.
Partial fuel flow from
the preceding causes.
Use the preceding isolation procedures,
checking for sufficient rate of flow. Using
the preceding remedies.
Malfunction of engine-
driven fuel pump.
Check pump outlet during starting.
Replace fuel pump. See Section IV.
Fuel vents plugged.
Check ram air inlet for blockage.
Pressure check each vent line. Clean or
replace vent line.
No fuel flow
when auxiliary
pump is on.
Defective electric
auxiliary fuel pump
switch.
Check continuity of switch. Replace
defective switch.
Open or defective
circuit breaker.
Check visually. If not open, check
continuity. Reset. Replace if defective.
Loose connections or
open circuit.
Check connections and wiring. Tighten
connections; repair or replace wiring.
Defective auxiliary fuel
pump.
Disconnect outlet line. With proper fuel
supply to pump, fuel under pressure
should flow from outlet. Replace
defective pump.
Defective engine-
driven fuel pump by-
pass valve.
Check pump outlet during starting. See
Section IV and replace fuel pump if by-
pass valve is defective or installed
backwards.
Fuel flow
indicator
inoperative.
(Optional Equip)
No voltage to
indicator.
Check voltage and ground wire. If voltage
is present and ground is good, replace
indicator, maintaining the same K factor.
Fuel flow
Indicator comes
on but will not
show fuel flow.
(Optional Equip)
Bad wires to
transducer or
defective transducer.
To check transducer, remove four screws
holding wire housing to flow vane
housing. With battery power on, pass
screwdriver back and forth over wire
housing pickups. You should get a
reading on indicator. If no reading,
replace units.
*NOTE*
Any time you have to replace either the fuel flow indicator or the transducer,
you must be sure to have the unit calibrated to same K factor as set by the
manufacturer. It will cause bad indications if mismatched K factors are installed
together.
To Next Page
Loading...
