Adf Functional Check; Gra 5500 Radar Altimeter Functional Check; Non-Garmin Radar Altimeter Check (Optional) - Garmin G1000 Nxi System Maintenance Manual

ADF Functional Check

This check verifies that the ADF / G1000 interface operates correctly.
1. Press the PFD softkey on PFD1 and PFD2. Toggle the BRG1 and BRG2 softkey until
the ADF bearing is shown on PFD1 and PFD2.
2. Verify that the ADF window is not invalid (no red 'X').
3. Using the ADF control head select a known valid local ADF. Verify that the ADF bearing
pointer moves towards a bearing and stabilizes.
4. Select ADF and SPKR on GMA1 and GMA2. Using the ADF control head, select, ANT
mode. Verify that the audio from the station tuned can be heard on the pilot and copilot
headset and cockpit speaker.
5. Increment the ADF volume control from full low to full high. Verify the volume increases
and decreases appropriately over pilot and copilot headset and cockpit speaker.
6. If no other service is to be performed, continue to the return-to-service checks in Section
9.

GRA 5500 Radar Altimeter Functional Check

This check verifies that the G1000/radar altimeter interface is operates correctly.
1. Navigate to the Aux – System Status page on the MFD.
2. Press the RA Test softkey and verify that the "RA TEST" annunciation is displayed on
both PFDs.
3. Verify 40 feet is displayed in the RA display window on both PFDs.
4. Press the RA Test softkey again. Verify the RA readout window decreases to 0 feet on
PFD1 and PFD2.
5. Pull the RADIO ALTM circuit breaker. Verify on PFD 1 and PFD 2 that an RA FAIL
message is displayed.
6. Reset the RADIO ALTM circuit breaker.
7. If no other service is to be performed, continue to the return-to-service checks in Section
9.

Non-Garmin Radar Altimeter Check (Optional)

This check verifies that the G1000 / radar altimeter interface is operates correctly.
This check only verifies the data output from the G1000 equipment. Any
equipment/wiring added that is not part of the installation data will need
separate testing and verification not covered as part of this document.
1. Navigate to the Aux – System Status page on the MFD.
2. Press the RA Test softkey and verify that "RA TEST" annunciation is displayed on both
PFDs.
3. Verify 50 feet is displayed in the RA display window on both PFDs.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
NOTE
Page 351
Revision 1