Garmin SA01456Wi_D Manual Page 195

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G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air Page 5-71
190-00682-01 Revision F
5.15.2 GRS Alerts
Failure Message Cause Solutions
MANIFEST – GRS1 software
mismatch. Communication
halted.
The system has detected an
incorrect software version loaded
in the specified GRS 77.
Load correct software version. See
Section 3.9 for the Software Load
Procedure.
MANIFEST – GRS2 software
mismatch. Communication
halted.
AHRS1 SERVICE – AHRS1
magnetic-field model needs
update.
The AHRS magnetic field model
should be updated for the
specified unit. Appears on ground
only.
Load updated AHRS magnetic field
file. See Section 4.6.
AHRS2 SERVICE – AHRS2
magnetic-field model needs
update.
GEO LIMITS – AHRS1 too far
north/south, no magnetic
compass.
No magnetic compass information
available due to being too far
north or south.
Operate the aircraft only within the
limits as specified in the G1000/GFC
700, King Air C90A/C90GT/C90GTi
AFMS, listed in Table 1-3
GEO LIMITS – AHRS2 too far
north/south, no magnetic
compass.
AHRS1 TAS – AHRS1 not
receiving airspeed.
The specified GRS 77 is not
receiving airspeed from the GDC
74A.
Check GRS/GDC interconnect for
faults.
Replace the GDC 74:
If problem persists, replace the GRS
77.
AHRS2 TAS – AHRS2 not
receiving airspeed.
AHRS1 GPS – AHRS1 not
receiving backup GPS
information.
The GRS 77 #1 is not receiving
backup GPS information from
either GIA 63.
Ensure that a cell phone or a device
using cell phone technology is not
turned on (even in a monitoring
state) in the cabin.
Check GPS status for GIA 1 and 2
on MFD - AUX GPS STATUS page.
If one or both GPS receivers cannot
acquire a position lock, see GPS
troubleshooting section
Troubleshoot GIA1/2 –GRS1 wiring
for faults (ref. Failed Path
troubleshooting section).
Replace the GRS 77 #1.
AHRS1 GPS – AHRS1 operating
exclusively in no-GPS mode.
The GRS 77 #1 is operating in the
absence of GPS.
AHRS1 GPS – AHRS1 not
receiving any GPS information.
The GRS 77 #1 is not receiving
GPS data from the GPS receivers.
AHRS1 GPS – AHRS1 using
backup GPS source.
The GRS 77 #1 is using the
backup GPS data path.
AHRS2 GPS – AHRS2 not
receiving backup GPS
information.
The GRS 77 #2 is not receiving
backup GPS information from
either GIA 63.
Ensure that a cell phone or a device
using cell phone technology is not
turned on (even in a monitoring
state) in the cabin.
Check GPS status for GIA 1 and 2
on MFD - AUX GPS STATUS page.
If one or both GPS receivers cannot
acquire a position lock, see GPS
troubleshooting section
Troubleshoot GIA1/2 –GRS2 wiring
for faults (ref. Failed Path
troubleshooting section).
Replace the GRS 77 #2
AHRS2 GPS – AHRS2 operating
exclusively in no-GPS mode.
The GRS 77 #2 is operating in the
absence of GPS.
AHRS2 GPS – AHRS2 not
receiving any GPS information.
The GRS 77 #2 is not receiving
GPS data from the GPS receivers.
AHRS2 GPS – AHRS2 using
backup GPS source.
The GRS 77 #2 is using the
backup GPS data path.
AHRS MAG DB – AHRS magnetic
model database version
mismatch.
The G1000 has detected a
magnetic model database version
mismatch.
Load AHRS magnetic model field in
both GRS units.
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