Garmin G1000 King Air C90GT - Manual (Page 441)

190-00663-01 Rev. A Garmin G1000 Pilot’s Guide for the Beechcraft C90A/GT 427
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
APPROACH MODES (GPS, VAPP, LOC)
NOTE: The selected navigation receiver must have a valid VOR or LOC signal or active GPS course for the
flight director to enter Approach Mode.
Approach Mode is activated when the APR Key is pressed. Approach Mode acquires and tracks the selected
navigation source (GPS, VOR, or LOC), depending on loaded approach. This mode uses the selected navigation
receiver deviation and desired course inputs to fly the approach. Pressing the APR Key when the CDI is greater
than one dot arms the selected approach mode (annunciated in white to the left of the active lateral mode). If
the CDI is less the 1 dot, the LOC is automatically captured when the APR Key is pressed.
VOR Approach Mode (VAPP) provides greater sensitivity for signal tracking than VOR Navigation Mode.
Selecting VOR Approach Mode:
1) Ensure a valid VOR frequency is tuned
2) Ensure that VOR is the selected navigation source (use the CDI Softkey to cycle through navigation sources if
necessary).
3) Press the APR Key.
When GPS Approach Mode is armed, Glidepath Mode is also armed.
Selecting GPS Approach Mode:
1) Ensure a GPS approach 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.
Figure 7-28 GPS Approach Mode Armed
LOC Approach Mode allows the autopilot to fly a LOC/ILS approach with a glideslope. When LOC Approach
Mode is armed, Glideslope Mode is also armed automatically. LOC captures are inhibited if the difference
between aircraft heading and localizer course exceeds 105°.
Selecting LOC Approach Mode:
1) Ensure a valid localizer frequency is tuned.
2) Ensure that LOC is the selected navigation source (use the CDI Softkey to cycle through navigation sources if
necessary).
3) Press the APR Key.
Or :