Page 7-4
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
Revision 1
190-00716-01
Transceiver Operational Check
Perform a ramp test radio check by exercising the installed transceivers, microphone, microphone key
and audio over the headphones and speaker. Verify that communications are clear and PTT operation is
correct for each pilot position.
1.
On the pilot’s audio panel, select the audio source corresponding to each installed avionics unit (i.e.
NAV1, NAV2, COM1, COM2, ADF and DME) and check for audio over the pilot’s headset.
2.
Press the SPKR key on pilot’s audio panel and verify that the selected audio is heard over the pilot’s
speaker.
3.
On the copilot’s audio panel, select the audio source corresponding to each installed avionics unit (i.e.
NAV1, NAV2, COM1, COM2, ADF and DME) and check for audio over the copilot’s headset.
4.
Press the SPKR key on copilot’s audio panel and verify that the selected audio is heard over the
copilot’s speaker.
Failsafe Operation Check – GMA 1347D #1
1.
Turn the GMA 1347D #1 off by pulling the AUDIO NO 1 circuit breaker. This directs all COM 1
phone audio, MIC audio and MIC key to the pilot’s position.
2.
Check the failsafe operation by exercising the COM 1 boom mic, hand mic, microphone key and
audio over the headphones. All volume control for the COM audio should be through the PFD
volume control. Verify proper operation of COM 1 using the failsafe operation.
3.
Close the AUDIO NO 1 circuit breaker to continue testing.
Failsafe Operation Check – GMA 1347D #2
1.
Turn the GMA 1347D #2 off by pulling the AUDIO NO 2 circuit breaker. This directs all COM 2
phone audio, MIC audio and MIC key to the co-pilot’s position.
2.
Check the failsafe operation by exercising the COM 2 boom mic, hand mic, microphone key and
audio over the headphones. All volume control for the COM audio should be through the PFD
volume control. Verify proper operation of COM 2 using the failsafe operation.
3.
Close the AUDIO NO 2 circuit breaker to continue testing.
Marker Beacon Test
Figure 7-2, Marker Beacon Symbology
1.
Using a ramp tester, simulate the outer marker, middle marker and inner marker signals by following
the test equipment manufacturer’s instructions. Verify that each marker audio signal is present over
the pilot and co-pilot headphones and speaker.
2.
Verify that the outer, middle, and inner annunciations appear on PFD 1 and PFD 2 when the
corresponding signal is applied. Marker beacon annunciations appear at the upper left corner of the
altitude indicator on the PFD (Figure 7-2). Operate the MKR MUTE key on the #1 and #2 GMA
1347D and ensure that the audio signal is muted.
If no other service is to be performed, continue to the return-to-service checks in Section 8.
Summary of Contents for Cessna Caravan G1000
Page 2: ...This page intentionally left blank...
Page 89: ......
