190-00709-05 Rev. D
Garmin G1000 Pilot’s Guide for the Socata TBM 850/900
166
AUDIO PANEL AND CNS
4.8 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 flashes as long as the PTT Key remains
stuck.
Figure 4-63 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 4-64 COM Tuning Failure
Emergency Channel
Loaded Automatically
