190-02246-11
GI 275 Part 23 AML STC Maintenance Manual
Rev. 1
Page 5-34
5.12 Calibration
This section provides guidance for calibrating the GI 275 system if the previous calibration has become
invalid.
5.12.1 Attitude/Heading
If it becomes necessary to re-calibrate any installed AHRS, refer to the calibration procedures contained in
Section 5 and Section 6 of
GI 275 Part 23 AML STC Installation Manual
(P/N 190-02246-10).
5.12.2 Autopilot Calibration
If it becomes necessary to re-calibrate the autopilot, refer to the calibration procedure contained in
GI 275
Part 23 AML STC Installation Manual
(P/N 190-02246-10).
5.12.3 Analog NAV Calibration
If it becomes necessary to re-calibrate the Analog NAV, refer to the calibration procedure contained in
Section 6 of the GI 275 installation manuals (refer to Table 1-1).
5.12.4 Fuel Level Calibration
If it becomes necessary to re-calibrate the fuel level, refer to the calibration procedure contained in the
GI 275 installation manuals (refer to Table 1-1).
5.12.5 Backup Battery Check
This procedure will analyze the voltage and discharge qualities of the installed backup battery. The
procedure is required to be completed on initial installation and every 12 calendar months when a backup
battery is installed in the system. A fault indication message will be displayed in Normal mode until this
procedure is completed.
NOTE
The battery rundown test may take up to 150 minutes to complete.
NOTE
The battery rundown test date is reported in UTC.
To complete the backup battery test, complete the following steps:
1. Power on each GI 275 with an installed backup battery in Configuration mode.
2. Navigate to the
Backup Battery Test
page (
Calibration/Test
→
Backup Battery Test
).
3. Touch the
Before Test Checklist
button.
4. Verify that “Discharging” is not displayed under Battery State.
5. Touch the
Test Date
button and enter the current date.
6. Complete the on-screen
checklist. Touch each checklist item once completed. Once all checklist
items have a green check mark, touch the
Back
button.
7. Touch the
Start Test
button and follow the on-screen commands.
8. The GI 275 will power off automatically when the test is completed.
9. Power on the GI 275(s) in Configuration mode and navigate to the
Backup Battery Test
page.
