Garmin G1000 Nxi System Maintenance Manual page 174

Engine/Airframe Instrument Failures
The following table provides guidance for troubleshooting individual engine/airframe sensor
failures. Be sure to also follow previous guidance given for the GEA 71. The technician should
troubleshoot to isolate the fault by checking sensor-to-GEA wiring, replacing the suspect
sensor, and finally by replacing the GEA 71. Replace one part at a time. Refer to Section 7.4.3
to check for correct operation of the sensors and GEA 71 after any part has been replaced.
Refer to G1000 Wiring Diagram and King Air 300 Series Maintenance Manual (listed in Table
1-1) as needed.
Invalid Field
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Sensor Possible Solutions (for applicable engine/system)
•
Check thermocouple cable.
•
ITT Replace thermocouple cable.
•
Replace GEA 71.
•
Check torque transmitter – GEA wiring.
•
Check power input to torque transmitter.
Torque
•
Replace torque transmitter.
•
Replace GEA 71.
•
Check prop tachometer – Signal Conditioner wiring.
•
Check Signal Conditioner – GEA wiring.
•
Check power input to Signal Conditioner.
Prop RPM
•
Replace prop tachometer sensor.
•
Replace Signal Conditioner. Refer to Section 6.23.
•
Replace GEA 71.
•
Check engine speed tachometer – Signal Conditioner wiring.
•
Check Signal Conditioner – GEA wiring.
•
Check power input to Signal Conditioner.
Turbine RPM
•
Replace engine speed tachometer sensor.
•
Replace Signal Conditioner. Refer to Section 6.23.
•
Replace GEA 71.
•
Check Signal Conditioner unit wiring.
•
Check power input to Signal Conditioner
•
Fuel Flow Replace fuel flow transmitter.
•
Replace Signal Conditioner. Refer to Section 6.23.
•
Replace GEA 71.
•
Check oil pressure sensor – GEA wiring.
•
Oil Pressure
Replace oil pressure sensor.
•
Replace GEA 71.
•
Check oil temperature sensor – GEA wiring.
•
Oil Temperature
Replace oil temperature sensor.
•
Replace GEA 71.
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