Garmin G1000 Pilot's Manual page 351

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.
2) Transition from VOR to GPS Navigation Mode.
a) Press the CDI Softkey to select GPS as the navigation source. This causes the flight director to lose the VOR
signal, and 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 10 seconds of VOR signal loss, the flight director reverts to Roll Hold Mode
(wings rolled level).
3) Once the flight plan leg is intercepted, the autopilot continues to steer the aircraft under GPS guidance.
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190-00498-01 Rev. A
Flashes 10 sec, Transitions to Roll Hold
Mode Unless NAV Key is Pressed
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Figure 7-33 Transition to GPS Flight Plan
Garmin G1000 Pilot's Guide for Cessna Nav III
AUTOMATIC FLIGHT CONTROL SYSTEM
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