Garmin G1000 Nxi System Maintenance Manual page 171

Invalid Data Field
ATTITUDE FAIL
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Associate
d LRU(s)
•
Ensure that a cell phone or a device using cell phone
technology is not turned on (even in a monitoring state) in
the cabin.
•
Cycle GSU 75B, GRS 77, or GRS 7800 power to restart
initialization.
•
Ensure GSU 75B, GRS 77, or GRS 7800 connecter is
secure and proper wire harness strain relief is provided.
•
Ensure the GSU 75B, GRS 77, or GRS 7800 is fastened
down tightly in it's mounting rack and that the mounting
rack is not loose (CAUTION - do not loosen the mounting
rack hardware to the airframe shelf or the aircraft will need
to be re-leveled and the PITCH/ROLL OFFSET procedure
performed).
•
Ensure GPS has acquired at least four satellites, has a 3D
GSU 75B,
navigation solution, and a DOP of less than 5.0. This is
GRS 77, or
particularly important for an ATTITUDE FAIL that appears
GRS 7800
during ground operation only.
•
Perform an Engine Run-Up Test to check if engine
vibration is causing the GSU 75B, GRS 77, or GRS 7800 to
go offline.
•
Load configuration files to the PFD, MFD, GIA1, and GIA2.
•
Calibrate the GSU 75B, GRS 77, or GRS 7800 (Pitch/Roll
Offset and Magnetometer Calibration).
•
Replace GSU 75B, GRS 77, or GRS 7800.

If problem persists replace GSU 75B, GRS 77, or GRS
7800 configuration module.

Contact Garmin Aviation Product Support if condition
continues after replacing the GSU 75B, GRS 77, or
GRS 7800 and config module for additional
assistance
Solution
.
Page 158
Revision 1