190-01255-00 Rev. A
Garmin G1000H
™
Pilot’s Guide for the Bell 407GX
133
AUDIO PANEL AND CNS
4.7 ABNORMAL OPERATION
Abnormal operation of the system includes equipment failures of the system 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
MIC1
,
MIC2
or
MIC3
Key Annunciator on the Audio Panel flashes as long as the PTT Key remains stuck.
Figure 4-47 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 4-48 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 (left ear only if stereo) and
microphone directly to the COM1 transceiver. Audio is not available on the speaker during Fail-safe operation.
Summary of Contents for G1000H
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Page 146: ...190 01255 00 Rev A Garmin G1000H Pilot s Guide for the Bell 407GX 134 AUDIO PANEL AND CNS ...
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