Troubleshooting; Fuel System Trouble Shooting Chart - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT INC – MODEL S2RHG-T34 TURBO THRUSH
G. Allow the sealant to cure for 16 hours or more.
H. Pressure check fuel tank from 38 to 44 inches of water-manometer, for 3 (+1)
minutes.
Do not attempt to apply pressure to the tank without first
sealing off all lines and vents, and without an adequate
regulator to control pressure. Do not pressurize the tank in
excess of 1.589 psig (44.0 inches of water-manometer) or
damage may occur.
I. To prevent water and chemical entry into wing and empennage skin joints and
edges, make fillets by applying a small bead of CS 3204 B2 to all skin edges,
joints, and overlaps. The fillets can be painted after sealer has dried.
The trouble-shooting figure in this section discusses symptoms, which can be diagnosed
and interprets the results in terms of probable causes and the appropriate corrective
remedy to be taken. Review all probable causes given and check other listings of
troubles with similar symptoms. Items are presented in sequence, but not necessarily in
order of probability.

FUEL SYSTEM TROUBLE SHOOTING CHART

PROBLEM
No fuel quantity
Fuel tanks empty.
indication.
Fuel quantity indicator
circuit breaker open or
defective.
Defective fuel quantity
indicator or transmitter.
Loose connections or
open circuit.
5-10
AIRCRAFT MAINTENANCE MANUAL
**CAUTION**

TROUBLESHOOTING

PROBABLE CAUSE REMEDY
Check fuel quantity. Service with proper
grade and amount of fuel.
Check visually. If not open, check
continuity. Reset. Replace if defective.
Disconnect wire from transmitter at
indicator not registering and attach it to
an indicator that is registering. If
indicator does not register, transmitter is
defective. If the new indicator registers,
the existing indicator is defective.
Replace defective transmitter or
indicator.
Check connections and wiring. Tighten
connections; repair or replace wiring.
Effective: 05/25/05