Abnormal Operation; Stuck Microphone; Com Tuning Failure; Audio Panel Fail-Safe Operation - Garmin G1000 Pilot's Manual

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 Annunciation on the audio panel flashes as long as the PTT Key remains
stuck.

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.

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 is not available on the speaker.

REVERSIONARY MODE

The red DISPLAY BACKUP Button selects the Reversionary Mode. See the System Overview Section for
more information on Reversionary Mode.
190-02692-00 Rev. A
Figure 4-47 Stuck Microphone Alert
Emergency Channel
Loaded Automatically
Figure 4-48 COM Tuning Failure
Figure 4-49 Display Backup Button
Garmin G1000 Pilot's Guide for the Piper PA-32 Saratoga
AUDIO PANEL AND CNS
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