Garmin G2000 Pilot’s Guide for the Cessna T240
190-01263-01 Rev. A
452
AutomAtic Flight control SyStem
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Figure 7-12 Vertical Path Tracking Mode
Command Bars Indicate Descent to
Maintain Required Vertical Speed
Terminal
Phase of
Flight
FMS is
Selected
Navigation
Source
Vertical
Deviation
Indicator
VNAV Target Altitude
Capture Armed
Vertical Path
Tracking Active
Required
Vertical
Speed
Indication
VNV Target
Altitude
If the Altimeter’s barometric setting is adjusted while Vertical Path Tracking is active, the flight 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 VNAV 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 VNAV Target Altitude,
the aircraft may not re-establish on the descent path in time to meet the vertical constraint.
a
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everSion
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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 VNAV 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.
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