Instruction Manual

Page 5-60 G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
Revision 4 190-00716-01
5.11.3 Glideslope Alerts
Failure Message Cause Solution
G/S1 SERVICE – G/S1 needs
service. Return unit for repair.
The system has detected a failure
in G/S1 receiver.
• Replace GIA1.
G/S2 SERVICE – G/S2 needs
service. Return unit for repair.
The system has detected a failure
in G/S2 receiver.
• Replace GIA2.
G/S1 FAIL – G/S1 is inoperative.
The system has detected a failure
in G/S1 receiver.
• Switch GIA1 and GIA2 to verify
location of problem:
9 If problem follows the unit,
replace GIA.
9 If problem does not follow unit,
check G/S1 antenna and
cabling.
G/S2 FAIL – G/S2 is inoperative.
The system has detected a failure
in G/S2 receiver.
• Switch GIA1 and GIA2 to verify
location of problem:
9 If problem follows the unit,
replace GIA.
9 If problem does not follow unit,.
check G/S2 antenna and
cabling.
5.11.4 GPS Alerts
NOTE
Before troubleshooting, ensure that no cell phones or devices using cell phone technology
are turned on, even in a monitoring state, in the cabin.
Failure Message Cause Solution
MANIFEST – GPS1 software
mismatch. Communication
halted.
The system has detected an
incorrect software version loaded
in GIA1.
• Load the correct GPS software. See
Section 3.9 for the Software Loading
procedure.
MANIFEST – GPS2 software
mismatch. Communication
halted.
The system has detected an
incorrect software version loaded
in GIA2.
GPS1 SERVICE – GPS1 needs
service. Return unit for repair.
The system has detected a failure
in GPS1 receiver.
• Replace GIA.
GPS2 SERVICE – GPS2 needs
service. Return unit for repair.
The system has detected a failure
in GPS2 receiver.
GPS1 FAIL – GPS1 is inoperative.
The system has detected a failure
in GPS1 receiver.
• Switch GIA1 and GIA2, to verify
location of problem:
9 If problem follows the unit,
replace GIA.
9 If problem does not follow the
unit, check GPS antenna and
cabling.
GPS2 FAIL – GPS2 is inoperative.
The system has detected a failure
in GPS2 receiver.