Maintenance Intervals; Table 3-1 Periodic Maintenance - Garmin GI 275 Maintenance Manual

3.3 Maintenance Intervals

Item
GI 275 System
Visual Inspection
Backup Battery
Check
EIS Annunciator
Lamp Check
AHRS Magnetic
Field Model Update
Electrical Bonding
Check
Altimeter Checks
Lightning Damage
Check
Equipment Removal
and Replacement
190-02246-11
Rev. 1

Table 3-1 Periodic Maintenance

Description/ Procedure
All installed system LRUs, switches, knobs, and wiring
harnesses must be inspected to ensure continued integrity of
the installation. The inspection must be performed in
accordance with Section 3.4.
If installed, perform a Backup Battery Check as described in
Section 5.12.5.
If the backup battery does not pass the Backup Battery Check,
it must be replaced using the procedure found in Section 5.5.
If an EIS annunciator(s) is installed, perform a check of the
annunciator lamps using the following procedure:
1. Power on the GI 275 directly interfaced to the annunciator
in Configuration mode.
2. Navigate to Diagnostics → Discrete Outputs.
3. Toggle the state of the Engine Caution and Engine Warning
discrete outputs to Active.
4. Verify that the respective engine annunciator lights have
illuminated.
5. Toggle the state of the Engine Caution and Engine Warning
discrete outputs to Inactive.
The GI 275 Integrated ADAHRS utilizes an Earth magnetic field
model that is updated once every 5 years as part of the Aviation
Database maintained by the owner/operator. If the magnetic
model is not up-to-date, the unit will issue an alert upon start-up
indicating the model has expired. A Service Bulletin containing
the updated magnetic field model and instructions for
installation can be obtained from the
or by contacting Garmin.
Perform an electrical bonding check of the GI 275 system LRUs
in accordance with Section 3.5.
Test according to 14 CFR §43 Appendix E.
Refer to the pitot-static checkout procedure in Section 5.14.2
for system-specific checkout procedure.
Conduct an inspection of the GI 275 system in accordance with
Section 3.7.
Removal and replacement of the GI 275 system LRUs can be
accomplished by referring to Section 5 for instructions.
Dealer Resource Center
GI 275 Part 23 AML STC Maintenance Manual
Interval
12 calendar
months
12 calendar
months
12 calendar
months
Every 5 years
Every 2000
flight hours or
10 years,
whichever
comes first
Interval must be
in accordance
with Title 14
CFR §91.411
and 91.413
After a
suspected or
actual lightning
strike
On Condition
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