System Maintenance Manual

G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air Page 8-3
190-00682-01 Revision F
8.1.2 GIA Failure Test
Step Desired Result
GIA 1 Failure Conditions:
1. Ensure GPS satellites are acquired.
2. Open GIA1 primary and secondary CBs.
3. Verify desired results.
4. Close GIA1 primary and secondary CBs.
Allow system to re-acquire satellites and
return to normal display modes.
• NAV 1 and COMM1 tuning fields on PFD1 and
PFD2 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
PFD1 and PFD2.
• AHRS and ADC data remain valid on PFD1 and
PFD2.
GIA 2 Failure Conditions:
1. Open GIA 2 CB.
2. Verify desired results.
3. Close GIA 2 CB. Allow system to re-
acquire satellites and return to normal
display modes.
• NAV2 and COMM2 tuning fields on PFD1 and
PFD2 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
PFD1 and PFD2.
• AHRS and ADC data remain valid on PFD1 and
PFD2.
Dual GIA Failure Conditions:
1. Open GIA1 primary and secondary CBs
and GIA 2 CB.
2. Check for desired results.
3. Restore power to both GIA units.
Dual GIA Failure – For a dual GIA failure, the
following shall occur:
• COM1/NAV1 & COM2/NAV2 fields flag invalid.
• GPS CDI flags DR 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.
• TAWS FAIL annunciation given.*
• ADF/DME windows flag invalid.*
*If equipped.