Garmin G1000 NAV III Line Maintenance Manual page 33

Annunciation
Engine/Airframe Sensors
G1000 Nav III Line Maintenance Manual
190-00352-00
Associated Solution
LRU
•
Check for GEA related Alert messages on the PFD.
Correct any Alerts concerning software or configuration
errors by reloading software or configuration as noted.
•
Verify GEA internal power supply, configuration, and
calibration status in configuration mode.
Configuration and calibration boxes should be green.
o
If they are red, replace the GEA 71.
With GDU software version 4.00 or higher, the INT
o
PWR SUPPLY box should be green. If it is red, check
for a shorted airframe sensor (reference Cessna
wiring schematics for your aircraft type) by unplugging
airframe sensors that receive power from the GEA
one at a time until the INT PWR SUPPLY box turns
green. The last sensor that was unplugged before the
box turned green is the cause of the problem.
Replace that sensor (reference Cessna Aircraft
Maintenance Manual for instructions). Systems with
GDU software versions less than 4.00 will display a
red box, indicating proper operation. Troubleshoot in
the same manner as for GDU software above 4.00
GEA 71
except the box color will behave oppositely.
•
Verify internal, external, and reference voltages listed in
the Main Analog and I/O A Analog boxes are not dashed
out (does not include Aircraft Power 1 and 2). Reference
Section 2.7.1.2.
If any voltages are dashed out, replace the GEA.
o
•
Ensure the GEA is online (green checkmark on the
AUX – SYSTEM STATUS page).
If GEA is not online verify unit is receiving power at
o
the rack connector.
Check the GIA/GEA interconnects for faults.
o
Reload configuration files to both GIA's and the GEA.
o
If problem persists, replace the GEA 71.
o
•
For only Red-X of the EGT and CHT temperature
readings, replace the GEA configuration module and
backshell thermocouple.
If problem persists, replace the GEA 71.
o
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