Figure 4-9 Adc Alert Message Troubleshooting - Garmin GI 275 Maintenance Manual

ADC <1/2/3>
ADC MISSING
Maintenance
Log Message
ADC <1/2/3> data is
missing and cannot be
Not enough ADC sensors to
perform a comparison
Multiple ADCs are
configured in the
system and the
reported ADC is not
Ensure the missing
ADC is powered
Ensure the missing
ADC configuration
Verify wiring is
190-02246-C2
Rev. 3
ADC <1/2/3>
MISSING MISCOMPARE
-or- -or- ADC
MISCOMPARE
Maintenance
Log Message
ADC <1/2/3> does not
match other senosrs
compared
All ADC sensors do not
match
Cause Cause
Multiple ADCs are configured, a
reported ADC pressure altitude
difference of 200ft or more is
detected
detected
Multiple ADCs are configured, a
reported ADC airspeed
difference of 7kts or more is
detected
Corrective Corrective
Action Action
Ensure the altitude
and airspeed units
of measure are the
same for all
configured ADCs
is correct
Ensure there are no
leaks in the pitot
correct static system

Figure 4-9 ADC Alert Message Troubleshooting

ADC Fault Messages
ADC <1/2/3> ADC <1/2/3>
reports service reports service
required required
Maintenance
Log Message
ADC <1/2/3>
reports
configuration error
Cause Cause
ADC internal ADC is reporting a
calibration configuration error
mismatch
Corrective Corrective
Action Action
Perform ADC Verify ADC
calibration configuration
procedure settings
Service required
Maintenance
Log Message
<AHRS>
configuration does
not match what the
unit expected
Cause
AHRS LRU is not
configured correctly
Corrective
Action
Verify AHRS
configuration
settings
If fault persists,
contact Garmin.
GI 275 Part 27 AML STC Maintenance Manual
Page 4-16