Garmin G1000 Pilot's Manual page 308

AUTOMATIC FLIGHT CONTROL SYSTEM
FLYING A FLIGHT PLAN/GPS COURSE
Changing the navigation source cancels the flight director's Navigation Mode and causes the flight
NOTE:
director to automatically revert to Roll Hold Mode, wings level.
As the aircraft closes on Panoche VORTAC, a GPS flight plan is entered for the next leg, airway V230. To do
this, PXN, CZQ, and KFAT are entered into the active flight plan.
The aircraft is currently tracking inbound on the 116° radial of Panoche VORTAC.
Flying a GPS flight plan:
1) Enter Panoche VORTAC (PXN) and Clovis VORTAC (CZQ) into the GPS flight plan, in preparation to intercept this
leg.
2) Transition from VOR to GPS Navigation Mode.
a) Use the CDI Softkey to put the HSI in GPS mode. This cancels VOR mode on the HSI and the flight director loses
the VOR signal. As a result, the VOR annunciation flashes yellow as the autopilot rolls the wings level.
b) Press the NAV Key to activate GPS Navigation Mode and cause the autopilot to steer the aircraft toward the
active flight plan leg.
If the NAV Key is not pressed within ten seconds of the VOR signal loss, the flight director reverts to Roll Hold
Mode
3) Once the flight plan leg is intercepted, the autopilot continues to track GPS guidance to the end of the flight
plan.
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7-24
Flashes 10 sec, Transitions to Roll Hold
Mode Unless NAV Key is Pressed
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Figure 7-24 Transition to GPS Flight Plan
Garmin G1000 Pilot's Guide for the Diamond DA40/40F
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190-00592-02 Rev. A