Garmin G1000 Cockpit Reference Guide for the Cessna Nav III190-00384-09 Rev. A 13-9SECTION 13 – ANNUNCIATIONS& ALERTSA red ‘X’ may be the result of an LRU or an LRU function failure. The Figure 13-6 illustrates all possible flags and theresponsible LRUs.Figure 13-6 G1000 System Failure AnnunciationsGDC 74A Air DataComputerGTX 33 TransponderOrGIA 63/63WIntegrated AvionicsUnitsGDC 74A Air DataComputerGEA 71 EngineAirframe UnitOrGIA 63/63WIntegrated AvionicsUnitGIA 63/63WIntegrated AvionicsUnitsGRS 77 AHRSOrGMU 44MagnetometerGIA 63/63WIntegrated AvionicsUnitsGIA 63/63WIntegrated AvionicsUnitsDatabaseMismatch inPFD andMFD13.8 G1000 SYSTEM MESSAGE ADVISORIESThis section describes various G1000 system message advisories. Certain messages are issued due to an LRU or an LRUfunction failure. Such messages are normally accompanied by a corresponding red ‘X’ annunciation as shown previously inthe G1000 System Annunciation section.NOTe: This section provides information regarding G1000 message advisories that may be displayed by thesystem. Knowledge of the aircraft, systems, flight conditions, and other existing operational priorities mustbe considered when responding to a message. Always use sound pilot judgment. The Cessna aircraft Pilot’sOperating Handbook (POH) takes precedence over any conflicting guidance found in this section.
