System Maintenance Manual

Page 4-30 G1000 / GFC 700 System Maintenance Manual - 200/B200 Series King Air
Revision 6 190-00915-01
17. Replace AHRS1 to normal attitude and verify that attitude display on PFD1 displays current aircraft
attitude.
18. Repeat Steps 13 through 17 for AHRS2.
19. The G1000 Miscompare checks are complete.
4.14 Nose Avionics Compartment Fans Operational Check
This procedure will verify that airflow is present from the ported avionics cooling fans to the #1 and #2
GIA units. The fan speed monitoring circuits and annunciations are checked by the G1000 Cooling Fan
Fail Annunciation Check in Section 8.1.4 and a Visual Inspection of the fan and its hoses is accomplished
in Section 4.4. This check requires the G1000 to be powered on.
1. Gain access to the nose avionics compartment.
2. Disconnect cooling fan hose from the pilot side GIA and verify airflow is present.
3. Reconnect the cooling fan hose to the GIA.
4. Repeat Steps 2 through 3 for the copilot side GIA.
5. The Nose Avionics Compartment Fans Operational Check is complete.
4.15 Instrument Panel Fans Operational Check
This procedure will verify that airflow is present from the PFD1, MFD and PFD2 cooling fans. The fan
speed monitoring circuits and annunciations are checked by the G1000 Cooling Fan Fail Annunciation
Check in Section 8.1.4. This check requires the G1000 to be powered on.
1. Remove PFD1 as described in Section 6.1.
2. Identify the PFD1 cooling fan and verify airflow is present.
3. Reinstall PFD1 as described in Section 6.1.
4. Repeat Steps 1 through 3 for the MFD and PFD2.
5. The Instrument Panel Fans Operational Check is complete.