Garmin DA40 GPS Receiver User Manual


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190-00592-06 Rev. A
Garmin G1000 Pilot’s Guide for Diamond DA40/40F
373
AUTOMATIC FLIGHT CONTROL SYSTEM
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
au t o M a t i c Re v e R s i o n t o Pi t c h ho l D Mo D e
Several situations can occur while Vertical Path Tracking Mode is active which cause the flight director to
revert to Pitch Hold Mode:
•Verticaldeviationexceeds200feetduringanoverspeedcondition.
•Verticaldeviationexperiencesadiscontinuitythatbothexceeds200feetinmagnitudeandresultsinthe
vertical deviation exceeding 200 feet in magnitude. Such discontinuities are usually caused by flight plan
changes that affect the vertical profile.
•Verticaldeviationbecomesinvalid(theVerticalDeviationIndicatorisremovedfromthePFD).
•AdisplayentersReversionaryMode(thisdoesnotapplytoanactiveverticaldirect-to).
Unless VNV is disabled, Vertical Path Tracking Mode and the appropriate altitude capture mode become
armed following the reversion to Pitch Hold Mode to allow for possible profile recapture.
no n -Pa t h De s c e n t s
Pitch Hold, Vertical Speed, and Flight Level Change modes can also be used to fly non-path descents
while VNV flight control is selected. If the VS or FLC Key is pressed while Vertical Path Tracking Mode is
selected, Vertical Path Tracking Mode reverts to armed along with the appropriate altitude capture mode to
allow profile re-capture.
Figure 7-13 Flight Level Change VNV Non-Path Descent
To prevent immediate profile re-capture, the following must be satisfied:
•Atleast10secondshavepassedsincethenon-pathtransitionwasinitiated
•Verticaldeviationfromtheprolehasexceeded250feet,butisnowlessthan200feet
Pressing the VNV Key twice re-arms Vertical Path Tracking for immediate profile re-capture.
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