Garmin G1000 System Maintenance Manual page 112

(D) Engine data availability to the displays and GPS data availability to the AHRS with either GIA
inoperative check
1. Open the GIA1 (PRI) and GIA1 (SEC) circuit breakers.
2. Verify the following:
•
NAV 1 and COMM1 tuning fields on PFD 1 and PFD 2 are invalid (red X).
•
L/R engine data remains valid.
•
XPDR1 is Inoperative.
•
GMA1 is Inoperative.
•
AHRS1 is using backup GPS source.
•
AHRS2 not receiving backup GPS Information.
•
An amber BOTH ON GPS2 is displayed on PFD 1 and PFD 2.
•
AHRS and ADC data remain valid on PFD 1 and PFD 2.
3. Close the GIA1 (PRI) and GIA1 (SEC) circuit breakers. Allow system to re-acquire satellites and
return to normal display modes.
4. Open GIA2 CB.
5. Verify the following:
•
NAV2 and COMM2 tuning fields on PFD 1 and PFD 2 are invalid (red X).
•
L/R engine data remains valid.
•
XPDR2 is Inoperative.
•
GMA2 Is Inoperative.
•
AHRS2 is using backup GPS source.
•
AHRS1 not receiving backup GPS Information.
•
An amber BOTH ON GPS1 is displayed on PFD 1 and PFD 2.
•
AHRS and ADC data remain valid on PFD 1 and PFD 2.
6. Close GIA2 CB. Allow system to re-acquire satellites and return to normal display modes.
7. Open GIA1 primary and secondary CBs and GIA2 CB.
8. Verify the following:
•
COM1/NAV1 & COM2/NAV2 fields flag invalid.
•
GPS CDI flags LOI on PFD.
•
NAV1 & NAV2 CDI loses deviation bar.
•
XPDR field flags invalid on PFD.
•
Engine Instrument field flags invalid on MFD.
•
All AHRS & ADC fields remain valid.
•
Red AFCS status annunciation given.
•
If equipped with TAWS, TAWS FAIL annunciation given.
•
If equipped with ADF and/or DME, ADF/DME windows flag invalid.
9. Restore power to both GIA units.
The G1000 Redundant Connections Check is complete.
Page 4-24
Revision 1
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
190-00716-01