190-02207-A2 GPS 175/GNX 375/GNC 355 Part 23 AML STC Maintenance Manual
Rev. 3 Page 6-8
6.4 Display of Self-Test Data
During the normal power-up sequence, the splash screen is displayed, followed by the SW/Databases
page, followed by the Instrument Test page. While on the SW/Databases page, touch the Continue button
to advance to the Instrument Test page. During this time, electrical outputs are activated and set to the
values listed in Table 6-1.
Table 6-1 Instrument Test Data
Parameter Instrument Test Value
LCDI Half Left
LFLG Out of View
VCDI Half Up
VFLG Out of View
TO/FROM N/A
OBS
The GNX displays the OBS value (149.5° if interfaced to an HSI
with driven course pointer).
DTK 149.5° (Displayed as 150°)
Items below do not display on the Instrument Test page.
Distance to Go 10.0 nautical miles
Time to Go 4 minutes
Active Waypoint GARMIN
Groundspeed 150 knots
Present Position N 39°04.05’, W 94°53.86’
Waypoint Alert Active
Phase of Flight En Route
Message Alert Active
Leg/OBS Mode Leg Mode
GPS Integrity Invalid
Roll Steering (if applicable)
Flight Director commands 0° bank (level flight) for 5 seconds,
increasing right bank at 1°/second for 5 seconds, 5° right bank for
5 seconds, decreasing right bank at 1°/second for 5 seconds until
0° bank is reached. This cycle repeats continuously.
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