Pilot's Guide

190-00663-02 Rev. B
Garmin G1000 Pilot’s Guide for the Hawker Beechcraft C90A/GT/GTi
415
AUTOMATIC FLIGHT CONTROL SYSTEM
Whena descentlegiscaptured(i.e.,vertical deviationbecomesvalid),VerticalPathTrackingbecomes
activeandtracksthedescentprole(Figure7-19).Analtitudecapturemode(‘ALTS’or‘ALTV’)isarmedas
appropriate.
Figure 7-19 Vertical Path Tracking Mode
VNV Target Altitude
Capture Armed
Vertical Path
Tracking Active
GPS is Selected
Navigation
Source
Terminal
Phase of
Flight
Command Bars Indicate Descent to
Maintain Required Vertical Speed
VNV Target
Altitude
Required
Vertical
Speed Bug
Vertical Deviation
Indicator (VDI)
If the altimeter barometric setting is adjusted while Vertical Path Tracking is active, the ight director
increases/decreasesthedescentratebyupto500fpmtore-establishtheaircraftonthedescentpath(without
commanding a climb). Adjusting the altimeter barometric setting creates discontinuities in VNV vertical
deviation, moving the descent path. For large adjustments, it may take several minutes for the aircraft to re-
establishonthedescentpath.IfthechangeismadewhilenearingawaypointwithaVNVTargetAltitude,
the aircraft may not re-establish on the descent path in time to meet the vertical constraint.