BendixKing SG 465 System EFS 40/50 - Manual (Page 197)

Operating Instructions
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BACK COURSE APPROACH
An option may be selected at the
time of installation and certifica-
tion to automatically declutter GS
information when the aircraft
heading is greater than + or - 105
degrees from selected ILS
course. EHSI NAV MAP CDI
sensing is reversed and “BC” is
annunciated below the deviation
scale. EADI CDI sensing is
reversed and “BC” is displayed to
the left of the center diamond.
Not all installations will declutter
the glideslope scale. This is a
display configuration option
selected at the time of installa-
t i o n .
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ADF APPROACH
After selecting ADF mode and
tuning ADF #1 receiver to the
desired NDB, set Bearing pointer
#1 to ADF. Using CRS control,
select desired course TO or
FROM the NDB. The course
deviation bar on the EHSI now
provides left-right guidance in fly-
ing the selected course as it
would in flying a VOR course.
This eliminates the mental calcu-
lations required while tracking an
NDB course in the conventional
manner. NDB station passage is
indicated by the TO-FROM indi-
cator and Bearing pointer rever-
s a l .
N o t e : DF D-Bar presentation
may not be available if the
ADF does not provide a suit -
able flag output.
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LNAV (RNAV) APPROACH
After selecting LNAV mode and
the desired waypoint, set Bearing
Pointer #1 to the desired #1
bearing sensor. If the installed
LNAV supports selected course
from the EFS 40/50, use the
CRS knob to select desired
course TO or FROM the way-
point. The course deviation bar
on the EHSI now provides guid-
ance in flying the selected
course. Waypoint passage is
indicated by the TO-FROM indi-
cator and waypoint Bearing
pointer reversal.
Once the external LNAV system
transmits to the EFS 40/50 that it
is in an approach mode, the cyan
colors turn green on the EHSI
and system sensitivity increases
to 1.25 NM or ± 0.3 NM for GPS
left or right for full-scale CDI
deflection. The sensitivity
becomes variable when doing a
G P S approach with variable
VNAV enabled for SW 15 and
later. Cross-side annunciation
remains yellow, but the increased
sensitivity is implemented if the
cross-side LNAV is in Approach
Approved mode.
Note: Depending on the type of
LNAV installed, the Lateral
Deviation Scale may be differ -
ent and may only support DTK.
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VNAV GPS PRECISION
APPROACH
When the LNAV is capable of
displaying precision approaches
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Section 5mp 9/9/10 3:52 AM Page 5.4