190-02246-11
GI 275 Part 23 AML STC Maintenance Manual
Rev. 1
Page 3-4
3.3 Maintenance Intervals
Table 3-1 Periodic Maintenance
Item
Description/ Procedure
Interval
GI 275 System
Visual Inspection
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.
12 calendar
months
Backup Battery
Check
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.
12 calendar
months
EIS Annunciator
Lamp Check
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
.
12 calendar
months
AHRS Magnetic
Field Model Update
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.
Every 5 years
Electrical Bonding
Check
Perform an electrical bonding check of the GI 275 system LRUs
in accordance with Section 3.5.
Every 2000
flight hours or
10 years,
whichever
comes first
Altimeter Checks
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.
Interval must be
in accordance
with Title 14
CFR §91.411
and 91.413
Lightning Damage
Check
Conduct an inspection of the GI 275 system in accordance with
After a
suspected or
actual lightning
strike
Equipment Removal
and Replacement
Removal and replacement of the GI 275 system LRUs can be
accomplished by referring to Section 5 for instructions.
On Condition