Cockpit Reference Guide

Garmin G1000 Cockpit Reference Guide for the Cessna Nav III
12-8
SECTION 12 – ANNUNCIATIONS
& ALERTS
System Annunciation Comment
Display is not receiving valid transponder information.
‘LOI’ Indicates Loss of Integrity of GPS information. GPS information is
either not present or is invalid for navigation use. ‘DR’ may also be seen
indicating that GPS is in Dead Reckoning Mode. Note that AHRS utilizes GPS
inputs during normal operation. AHRS operation may be degraded if GPS
signals are not present (see AFMS).
Other Various Red X Indications
A red ‘X’ through any other display field, such as engine instrumentation
fields, indicates that the field is not receiving valid data.
A red ‘X’ may be the result of an LRU or an LRU function failure. The Figure 12-6 illustrates all possible flags and the
responsible LRUs.
Figure 12-6 G1000 System Failure Annunciations
GDC 74A Air Data
Computer
GTX 33 Transponder
OR
GIA 63/63W
Integrated Avionics
Units
GDC 74A Air Data
Computer
GEA 71 Engine
Airframe Unit
OR
GIA 63/63W
Integrated Avionics
Unit
GIA 63/63W
Integrated Avionics
Units
GRS 77 AHRS
OR
GMU 44
Magnetometer
GIA 63/63W
Integrated Avionics
Units
GIA 63/63W
Integrated Avionics
Units