System Maintenance Manual

Page 5-72 G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air
Revision G 190-00682-01
Failure Message Cause Solutions
MAG VAR WARN – Large
magnetic variance. Verify all
course angles.
Magnetic variance value from
GMU 44 is not accurate.
• If flying near large radio towers or
other sources of possible
electromagnetic interference, the
condition should correct itself as the
aircraft leaves the area.
• If problem persists, run magnetic
interference check in Section 5.15.4
to check for magnetic interference in
the aircraft.