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Figure 4-50 Audio Panel ControlsReversionary Mode for PFD1 and MFDPilot Side Copilot SideManual SquelchICS Volume and Squelch Control VOL AnnunciationSQ AnnunciationMaster Volume ControlICS IsolationReversionary Mode for PFD2 and MFD
Independent radio volume adjustments made using the PFD controls will affect only the audio output for each radio selected for adjustment. Radio volume adjustment will affect both crew positions equally for each radio that is adjusted. Turning the master volume control located on either Audio Panel will affect only the audio heard in the corresponding crew position headset. Thus, radio volume adjustments may be overridden by each crew position independently using the master volume control on the Audio Panel for the respective crew position. The master volume control for each Audio Panel will affect all other system audio output for the pilot or copilot headset.
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AVOIDANCE AFCS ADDITIONAL
FEATURES APPENDICES INDEX
Setting the Audio Panels during preflight:
1) Verify that the INTR COM Key is selected.
2) Verify that the MAN SQ Annunciator is extinguished.
3) Turn the MSTR Knob (Master Volume Control) on both Audio Panels clockwise two full turns. This will set the headset audio level to max volume (least amount of attenuation).
4) Adjust radio volume levels (COM, NAV, etc.) to a suitable level.
5) Adjust the ICS volume Knob on each Audio Panel to the desired intercom level.
Once this procedure has been completed, the master volume controls on both Audio Panels may now be adjusted. The flight crew can change settings, keeping in mind the notes above.
Figure 4-51 Radio and Headphone Volume ControlsRadio Volume Knobs Adjust Radio LevelCopilot Master Volume ControlPilot Master Volume ControlMaster Volume Knobs Adjust Headphone Volume LevelCOM Radio AudioNAV Radio AudioFMS Knob Adjusts ADF Volume LevelADF Radio Audio
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INDEX APPENDICES FEATURES
4.7 Abnormal Operationperation
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 4-52 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 4-53 COM Tuning FailureEmergency Channel Loaded Automatically
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FEATURES APPENDICES INDEX
PFD Failure, Dualual Systemystem
If PFD1 fails, COM1 and NAV1 display a red X on both remaining displays. NAV1 is unavailable. COM1 automatically tunes 121.500 MHz, but the frequency is not shown. The COM1 emergency frequency is available to both the copilot and pilot.
Figure 4-54 Frequency Section of PFD2 Display after PFD1 Failure Emergency Channel Loaded Automatically
If PFD2 fails, COM2 and NAV2 display a red X on the remaining PFD display. NAV2 is unavailable. COM2 tunes 121.500 MHz, but the frequency is not shown. The COM2 emergency frequency is available to both the copilot and pilot.
Figure 4-55 PFD1 Display after PFD2 Failure
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Audio Panel and CNS
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OVERVIEW
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& CNS
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MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
Audio Panel Fail-safe Operationperation
If there is a failure of both Audio Panels, a fail-safe circuit connects the pilot’s headset and microphone directly to the COM1 transceiver and the copilot’s headset directly to the COM2 transceiver. Audio will not be available on the speakers.
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Cessna Citation Mustang G1000 Integrated Flight Dec(54)
