Automatic flight control system – Garmin G1000 King Air C90GT User Manual

Page 428

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Garmin G1000 Pilot’s Guide for the Beechcraft C90A/GT

190-00663-01 Rev. A

414

AUTOMATIC FLIGHT CONTROL SYSTEM

SY

STEM

O

VER

VIEW

FLIGHT

INSTRUMENTS

EIS

AUDIO P

ANEL

& CNS

FLIGHT

MANA

GEMENT

HAZARD

AV

OID

ANCE

AFCS

ADDITIONAL FEA

TURES

APPENDICES

INDEX

Prior to descent path interception, the Selected Altitude must be set below the current aircraft altitude

by at least 75 feet. For the flight director to transition from Altitude Hold to Vertical Path Tracking Mode,
acknowledgment is required within five minutes of descent path interception by:

• Pressing the VNV Key

• Adjusting the Selected Altitude

If acknowledgment is not received within one minute of descent path interception, the white ‘VPTH’

annunciation starts to flash. Flashing continues until acknowledged or the descent path is intercepted. If
the descent is not confirmed by the time of interception, Vertical Path Tracking Mode remains armed and the
descent is not captured.

In conjunction with the “TOD [top of descent] within 1 minute” annunciation in the PFD Navigation Status

Box and the “Vertical track” voice message, VNV indications (VNV Target Altitude, vertical deviation, and
vertical speed required) appear on the PFDs in magenta (Figure 7-14).

Figure 7-14 Vertical Path Capture

GPS is Selected

Navigation

Source

Enroute

Phase of

Flight

Required

Vertical

Speed Bug

VNV Target

Altitude

Vertical

Deviation

Indicator

Selected

Altitude

Vertical Path Tracking

Armed (Flashing Indicates

Acknowledgment Required

Altitude Hold

Mode Active

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