G1000 Supplemental Maintenance Manual
Page 9-8
Textron Nav III Series
Revision 3
190-02128-04
9.6 GIA Failure Test
Step
Desired Result
GIA 1 Failure Condition:
1. Ensure GPS satellites are acquired.
2. Open NAV1/ENG (ESS BUS) and NAV1/ENG
(AVN BUS 1) CBs.
3. Verify desired results.
4. Close both NAV1/ENG CBs. Allow system to
re-acquire satellites and return to normal
display modes.
For a GIA 1 failure condition, the following shall occur:
•
NAV 1 and COMM1 tuning fields on PFD are invalid
(red X).
•
Engine data remains valid
•
AHRS is using backup GPS source.
•
AHRS and ADC data remain valid on PFD.
GIA 2 Failure Condition:
1. Open NAV2 CB.
2. Verify desired results.
3. Close NAV2 CB. Allow system to re-acquire
satellites and return to normal display modes.
For a GIA 2 failure condition, the following shall occur:
•
NAV2 and COMM2 tuning fields on PFD are invalid
(red X).
•
Engine data remains valid.
•
AHRS not receiving backup GPS Information.
•
AHRS and ADC data remain valid on PFD.
Dual GIA Failure Condition:
1. Open NAV1/ENG (ESS BUS), NAV1/ENG
(AVN BUS 1), and NAV 2 CBs.
2. Check for desired results.
3. Restore power to both GIA units.
For a dual GIA failure, the following shall occur:
•
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.
•
TAWS FAIL annunciation given.
•
ADF/DME windows flag invalid.*
*If equipped.
Summary of Contents for G1000 NXi
Page 61: ......
