Cockpit Reference Guide

190-00763-02 Rev. A Garmin G1000 Pilot’s Guide for the Piper PA-46 Meridian 144
AUDIO PANEL AND CNS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EICAS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICESINDEX
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crew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 4-50 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 4-51 COM Tuning Failure
Emergency Channel
Loaded Automatically