Pilot's Guide

190-00552-05 Rev. A
Garmin G1000 Pilot’s Guide for the Cessna Corvalis/Corvalis TT
135
AUDIO PANEL AND CNS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
4.7 ABNORMAL OPERATION
Abnormal operation of the G1000 includes equipment failures of the G1000 components and failure of
associatedequipment,includingswitchesandexternaldevices.
STUCK MICROPHONE
Ifthepush-to-talk(PTT)Keybecomesstuck,theCOMtransmitterstopstransmittingafter35secondsof
continuousoperation.AnalertappearsonthePFDtoadvisethepilotofastuck microphone.
The COM1 MIC or COM2 MIC KeyAnnunciatorontheAudioPanelashesaslongasthePTTKeyremains
stuck.
Figure 4-56 Stuck Microphone Alert
COM TUNING FAILURE
IncaseofaCOMsystemtuningfailure,theemergencyfrequency(121.500MHz)isautomaticallytunedin
theradioinwhichthetuningfailureoccurred.Dependingonthefailuremode,aredXmayappearonthe
frequency display.
Figure 4-57 COM Tuning Failure
Emergency Channel
Loaded Automatically
AUDIO PANEL FAIL-SAFE OPERATION
IfthereisafailureoftheAudioPanel,afail-safecircuitconnectsthepilot’sheadsetandmicrophonedirectly
totheCOM1transceiver.Audiowillnotbeavailableonthespeaker.
REVERSIONARY MODE
The red DISPLAY BACKUP Button selects Reversionary Mode for both displays.  Reversionary Mode
operationdisplaysightandengineinformationonboththePFDandMFD,incaseofdisplayfailure.
See the System Overview Section for more information on the DISPLAY BACKUPButton.
Figure 4-58 Display Backup Button