Cockpit Reference Guide

190-00763-02 Rev. A
Garmin G1000 Pilot’s Guide for the Piper PA-46 Meridian
417
AUTOMATIC FLIGHT CONTROL SYSTEM
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EICAS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
Automatic Reversion to Pitch Hold Mode
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ight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.
Non-Path Descents
Pitch Hold, Vertical Speed, and Flight Level Change modes can also be used to fly non-path descents
whileVNVight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 7-14 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prolere-capture.