Instruction Manual

Page 4-26 G1000 / GFC 700 System Maintenance Manual - 200/B200 Series King Air
Revision 9 190-00915-01
4.10 G1000 Redundant Connection Check
NOTE
Throughout this check prior to the 0985.07 software version, indicators showing “GDC
74” are applicable to the GDC 74B and the optional GDC 7400 air data computers. For
software version 0985.07 and subsequent, indicators show “GDC 74” for the GDC 74B
and “GDC 7400” for the GDC 7400 air data computer.
Perform the following steps to verify the following:
(A) The primary (PRI) and secondary (SEC) power sources for GIA 1, GRS 1, PFD 1, and GDC 1
(B) The AHRS and ADC data path to PFD
(C) PFD and MFD Ethernet connection (includes ARINC connection between ADC and MFD and
DISPLAY BACKUP button function)
(D) Engine data availability to the displays and GPS data availability to the AHRS with either GIA
inoperative
(A) PRI and SEC power sources for PFD 1, GIA 1, GRS 1 and GDC 1 check
1. Connect a ground power unit to the external power receptacle and turn on the ground power unit.
2. Set the BAT and AVIONICS MASTER PWR switches to ON.
3. With the G1000 system in normal mode, pull the following circuit breakers on the right hand circuit
breaker panel:
• PFD 1 (PRI)
• AHRS 1 (PRI)
• ADC 1 (PRI)
• GIA 1 (PRI)
4. Wait at least 5 seconds, then verify the data on PFD1 remains valid and the following alert messages
are not present:
• GIA 1 FAIL (or any related message such as COM1, NAV1, XPDR1, GPS1)
• AHRS 1 FAIL
• ADC 1 FAIL
• FAILED DATA PATH
5. Close the circuit breakers listed in step 3.
6. Repeat step 4.
7. Pull the following circuit breakers on the right hand circuit breaker panel:
• PFD 1 (SEC)
• AHRS 1 (SEC)
• ADC 1 (SEC)
• GIA 1 (SEC)
8. Wait at least 5 seconds, then repeat step 4.
9. Close the circuit breakers listed in step 7.