Garmin G1000 PDAs & Smartphones User Manual


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Garmin G1000 Pilot’s Guide for Cessna Nav III
190-00498-07 Rev. A
434
AUTOMATIC FLIGHT CONTROL SYSTEM
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICESINDEX
COMMAND BARS
Uponactivationoftheightdirector,CommandBarsaredisplayedonthePFDasasinglemagentacue.The
CommandBarsmovetogetherverticallytoindicatepitchcommands,andbankleftorrighttoindicateroll
commands.TheCommandBarsdonotoverridetheaircraftsymbol.
Iftheattitudeinformationsenttotheightdirectorbecomesinvalidorunavailable,theCommandBarsare
removedfromthedisplay.TheightdirectorCommandBarsalsodisappearifthepitchexceeds+30˚/-20˚or
bankexceeds65˚.
Figure 7-3 Command Bars
Aircraft Symbol
Command Bars
FLIGHT DIRECTOR MODES
Flight director modesarenormallyselected independentlyforthe pitchandrollaxes. Unlessotherwise
specified, all mode keys are alternate action (i.e., press on, press off). In the absence of specific mode selection,
theightdirectorrevertstothedefaultpitchand/orrollmodes(s).
ArmedmodesareannunciatedinwhiteandactiveingreenintheAFCSStatusBox.Undernormaloperation
whenthecontrolfortheactiveightdirectormodeispressed,theightdirectorrevertstothedefaultmodes(s)
for the axis(es).  Automatic transition from armed to active mode is indicated by the white armed mode
annunciationmovingtothegreenactivemodeeldandashingfor10seconds.
If the information required to compute a ightdirector mode becomes invalid orunavailable,theight
directorautomaticallyrevertstothe defaultmode forthataxis. A ashingyellowmode annunciationand
annunciatorlightindicatelossofsensor(ADC)ornavigationdata(VOR,LOC,GPS,SBAS)requiredtocompute
commands.Whensuchalossoccurs,thesystemautomaticallybeginstorollthewingslevel(entersRollHold
Mode)ormaintainthepitchangle(entersPitchHoldMode),dependingontheaffectedaxis.Theashing
annunciationstopswhentheaffectedmodekeyispressedoranothermodefortheaxisisselected.Ifafter10
secondsnoactionistaken,theashingannunciationstops.
Figure 7-4 Loss of VOR Signal
Theightdirectorisautomaticallydisablediftheattitudeinformationrequiredtocomputethedefaultight
director modes becomes invalid or unavailable.
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