Garmin Software Version 1308.10 User's Guide Page 127

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Garmin G2000 Cockpit Reference Guide for the Cessna Corvalis T240
190-01264-02 Rev. A 111
Abnormal Operation
Flight
Instruments EIS
Nav/Com/
XPDR/Audio AFCS FMS Nav
Flight
Planning Procedures
Hazard
Avoidance
Additional
Features
Abnormal
Operation
Annun/
Alerts Appendix Index
As a result of operating in DR Mode, all GPS-derived data is computed based upon
an estimated position and is displayed as yellow text on the display to denote degraded
navigation source information. This data includes the following:
Navigation Status Box fields except Active Leg, TAS, and DTK
GPS Bearing Pointer
Wind data and pointers in the Wind Data Box on the PFD
Current Track Indicator
All Bearing Pointer Distances
Active Flight Plan distances, bearings, and ETE values
Also, while the G2000 is in DR Mode, the autopilot will couple to GPS for up to 20
minutes. Terrain Proximity, TERRAIN-SVT, and TAWS are also disabled. Additionally,
the accuracy of all nearest information (airports, airspaces, and waypoints) is
questionable. Finally, airspace alerts continue to function, but with degraded accuracy.
SUSPECTED AUTOPILOT MALFUNCTION
NOTE: Consult the aircraft documentation for the location of circuit breakers
as well as specifics that may supplement or amplify this procedure.
If an autopilot failure or trim failure is suspected to have occurred, perform the
following steps:
1)
Firmly grasp the control wheel.
2)
Press and hold the AP DISC Switch. The autopilot will disconnect and
power is removed from the trim motor. Power is also removed from all
primary servo motors and engaged solenoids. Note the visual and aural
alerting indicating autopilot disconnect.
3)
Retrim the aircraft as needed. Substantial trim adjustment may be needed.
4)
Pull the appropriate circuit breaker(s) to electrically isolate the servo and
solenoid components.
5)
Release the AP DISC Switch.
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