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G1000 Supplemental Maintenance Manual
Page 9-5
Textron Nav III Series
Revision 3
190-02128-04
9.3 Reversion Mode Check
Push the red
DISPLAY BACKUP
button on the GMA 1347. Verify that the PFD and
MFD displays enter reversion mode (See Figure 9-4). MFD should have valid altitude,
airspeed, vertical speed, COM1, COM2, NAV1, NAV2 and engine instruments.
Figure 9-4, GDU Reversionary Mode
De-activate reversion mode by pushing the
DISPLAY BACKUP
button. Verify PFD and
MFD return to normal display modes.
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