Fuel quantity indicator fluctuates or reads low.
Defective pins in connector on harness that
mates with gage.
Compensator immersed in water.
Circuit out of calibration.
Tank unit(s) out of circuit.
Defective pins in connector on fuel probes and
wing harness used to connect fuel probes.
Fuel quantity gage pegs down scale against
a. Defective probe.
b. Defective pins on connectors on both gage and
c. Nacelle probe body is making contact with metal
braided hose inside of nacelle tank.
d. Defective indicator.
e. No power to fuel quantity indicator system.
Fuel quantity indicator needle pegs up scale
a. Defective indicator.
Turbine gas temperature indicator inoperative
or indicates inaccurately.
a. Defective or out of adjustment balance resistor.
b. Defective turbine gas temperature harness.
c. Defective turbine gas temperature indicator.
TROUBLESHOOTING GUIDE C - ELECTRICAL
Zero or low voltage indicated.
a. Circuit breaker tripped.
b. Loose connection.