Garmin G1000 NXi Pilot’s Guide for the Cessna NAV III
190-02177-02 Rev. A
386
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
If the following occurs, the flight director reverts to Roll Hold Mode (wings rolled level):
»
Approach Mode is active and a Vectors-To-Final is activated.
»
Approach Mode is active and Navigation source is manually switched.
»
During a LOC/ILS approach, GPS Navigation Mode is active and the FAF is crossed after the automatic
navigation source switch from GPS to LOC.
c
hanging
the
s
electeD
c
ourse
If the navigation source is VOR or localizer or OBS Mode has been enabled when using GPS, the Selected
Course is controlled using the
CRS
Knob.
Pressing the
CWS
Button and hand-flying the aircraft does not change the Selected Course while in
Approach Mode. The autopilot guides the aircraft back to the Selected Course (or GPS flight plan) when
the
CWS
Button is released.
GLIDEPATH MODE (GP)
NOTE:
Pressing the
CWS
Button while Glidepath Mode is active does not cancel the mode. The autopilot
guides the aircraft back to the glidepath upon release of the
CWS
Button.
Glidepath Mode is used to track the SBAS and Baro-VNAV based glidepath. When Glidepath Mode is
armed, ‘GP’ is annunciated in white in the AFCS Status Box.
Selecting Glidepath Mode:
1)
Ensure a GPS approach with vertical guidance or vertical descent angle (LPV, LNAV/VNAV, LNAV +V) is loaded
into the active flight plan. The active waypoint must be part of the flight plan (cannot be a direct-to a waypoint
not in the flight plan).
2)
Ensure that GPS is the selected navigation source (use the
CDI
Softkey to cycle through navigation sources if
necessary).
3)
Press the
APR
Key.
NOTE:
Some RNAV (GPS) approaches provide a vertical descent angle as an aid in flying a stabilized
approach. These approaches are NOT considered Approaches with Vertical Guidance (APV). Approaches
that are annunciated on the HSI as LNAV or LNAV+V should be flown to an MDA, until visual with the
landing surface, even though vertical glidepath (GP) information may be provided.
WARNING:
Do not rely on the autopilot to level the aircraft at the MDA/DH when flying an approach with
vertical guidance. The autopilot will not level the aircraft at the MDA/DH even if the MDA/DH is set in the
altitude preselect.