Thrush Aircraft S2R–T660 Maintenance Manual page 133

TROUBLE
No fuel flow when auxiliary
pump is turned on.
INTENTIONALLY
5 -15
THRUSH AIRCRAFT INC – T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
PROBABLE CAUSE
Fuel vents plugged.
Defective electric auxiliary
fuel pump switch.
Open or defective circuit
breaker.
Loose connections or open
circuit.
Defective auxiliary fuel pump.
Defective engine-driven fuel
pump by-pass valve.
LEFT
REMEDY
Pressure check each vent line.
Clean or replace vent line.
Check continuity of switch.
Replace defective switch.
Check visually. If not open,
check continuity. Reset.
Replace if defective.
Check connections and wiring.
Tighten connections; repair or
replace wiring.
Disconnect outlet line. With
proper fuel supply to pump,
fuel under pressure should
flow from outlet. Replace
defective pump.
Check pump outlet during
starting. See Section IV and
replace fuel pump if by-pass
valve is defective or installed
backwards.
Effective: 12/17/03