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Page 5-46
G1000 System Maintenance Manual
Rev. A
190-00903-00
5.1.6.6 Glideslope Advisory Messages
Advisory Message
Possible Cause
Recommended Actions
G/S1 SERVICE – G/S1 needs
service. Return unit for repair.
The G1000 has detected a
failure in G/S1 receiver.
Replace GIA1.
G/S2 SERVICE – G/S2 needs
service. Return unit for repair.
The G1000 has detected a
failure in G/S1 receiver.
Replace GIA2.
G/S1 FAIL – G/S1 is inoperative.
The G1000 has detected a
failure in G/S1 receiver.
•
Switch GIA1 and GIA2 to verify
location of problem:
−
If problem follows the unit,
replace GIA.
−
If problem does not follow
unit, check G/S1 antenna
and cabling.
G/S2 FAIL – G/S2 is inoperative.
The G1000 has detected a
failure in G/S2 receiver.
•
Switch GIA1 and GIA2 to verify
location of problem:
−
If problem follows the unit,
replace GIA.
−
If problem does not follow
unit, check G/S2 antenna
and cabling.
5.1.6.7 GPS Advisory Messages
NOTE
Ensure that no cell phones or devices in the cabin using cell phone
technology are turned on or in a monitoring state before starting GPS
troubleshooting procedures.
Advisory Message
Possible Cause
Recommended Actions
GPS1 SERVICE – GPS1 needs
service. Return unit for repair.
The G1000 has detected a
failure in GPS1 receiver.
Replace GIA1.
GPS2 SERVICE – GPS2 needs
service. Return unit for repair.
The G1000 has detected a
failure in GPS2 receiver.
Replace GIA2.
GPS1 FAIL – GPS1 is
inoperative.
The G1000 has detected a
failure in GPS1 receiver.
•
Switch GIA1 and GIA2, to verify
location of problem.
−
If problem follows the unit,
replace GIA1.
−
If problem does not follow
the unit, check GPS1
antenna and cabling.
GPS2 FAIL – GPS2 is
inoperative.
The G1000 has detected a
failure in GPS2 receiver.
•
Switch GIA1 and GIA2, to verify
location of problem.
−
If problem follows the unit,
replace GIA2.
−
If problem does not follow
the unit, check GPS2
antenna and cabling.
