(6) As the aircraft approaches the final
approach fix, verify that the LEG mode is selected and
that GPS is selected as the primary navigation source.
approach fix, the KLN 90B will make a prediction to
see if integrity will be available at the FAF and MAP. If
the prediction indicates that integrity monitoring will be
available, and RAIM is currently available, the KLN
90B will change the GPS APR annunciator to read
ACTV and the status line will indicate APR. Refer to
Figure 3-66. At this time, the KLN 90B will also start to
change the CDI scale factor. By the time the aircraft
reaches the FAF, the GDI scale factor will be down to
± 0.3 nm full-scale deflection.
Figure 3-66. GPS Approach Mode Active
Some approach procedures require adding
up several along track distances to be able
to identify a step down fix.
(8) A step down fix may not be included in
the list if waypoints are provided in the database.
Identify this point by using the along track distances
given in the profile view of the approach plate.
Remember, in the leg mode, the distance given by the
KLN 90B is the distance to the next point (in this case,
the MAP), not the distance from the last point (the
(9) The KLN 90B will again provide waypoint
alerting as the missed approach point is approached.
This is shown on the Super NAV 5 page as a flashing
active waypoint identifier, as well as the external
flashing waypoint annunciator. If the auto scale factor
was chosen for the Super NAV 5 page, the airport
diagram will be visible when the aircraft is within 5 nm
of the airport. More detail is shown as the aircraft gets
to within 1 nm of the airport.
approach are different from the published
procedure, it is always possible to select a
different DIRECT TO waypoint than the
default DIRECT TO waypoint.
(10) If a missed approach is required, the KLN
90B will not automatically sequence past the missed
approach point. To perform the published missed
approach procedure, press the D button to bring up
the Direct To page. The default waypoint will be the
first waypoint of the published missed approach
procedure. Confirm this waypoint as the DIRECT TO
waypoint and press the ENT button.
(11) Upon reaching the first point, the KLN
90B will sequence to the next waypoint in the missed
as. Off Airport Navaid Approach.
1. Load the approach into the flight plan. If
there is only one IAF, the KLN 90B does
not give the option to choose an IAF. If
there is no active flight plan (i.e., direct to
navigation is being used without an active
flight plan), the KLN 90B will ask to add
the airport and the approach to FPL 0.
Refer to Figure 3-67.
TO ADD KCVN
AND APPR TO
Figure 3-67. Load the Approach
2. If ATC then clears the aircraft to the IAF,
with the Super NAV 5 page displayed, pull
out the right inner knob and scan through
the active flight plan. Once the IAF is
displayed in the scanning window, press
the D button and then the ENT button
to initiate a direct to operation to the IAP.
3. At a distance of 4 nm to the IAF, the KLN
90B will give the message, IF REQUIRED