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6-9
90B will provide a message telling you to set the external
indicator (CDI or HSI) to a new value. If desired track
(DTK) is shown on the screen, this value will flash when
the external selected course does not match the DTK
within 10°.
NOTE: If the KLN 90B is interfaced to EFIS or a suitable
mechanical HSI through the optional KA 90 adapter, then
the external course pointer will be driven to the correct
value when leg sequencing occurs.
6. As the aircraft approaches the FAF (FREBY) it is a
good idea to check over the status of the KLN 90B. Look
at the external indicators to verify that LEG sequencing is
selected. Remember, the KLN 90B will not transition to
the approach active mode if the OBS mode is selected. If
the KLN 90B shares an HSI or CDI with other NAV
sources, it is also good to verify that the NAV/GPS switch
is set to GPS.
7. By the time the aircraft is 2 NM from FREBY, the
Final Approach Fix, the KLN 90B will make a prediction to
see if integrity will be available at the FAF and at the
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 (figure 6-15).
At this time the KLN 90B will also start to change the CDI
scale factor. By the time the aircraft reaches the FAF
(FREBY) the CDI scale factor will be down to ±0.3 NM.
8. The fix NOELE is not included in the list of waypoints
provided in the database. You will need to identify this
point by using the along track distances given in the pro-
file view of the approach plate. In this example NOELE is
located 1.3 NM from the MAP. When the distance to
MA25B is 1.3 NM, then the aircraft is at NOELE and you
can descend to the MDA for this approach.
NOTE: Some approach procedures require that you add
up several along-track distances to be able to identify a
step down fix.
9. The KLN 90B will again provide waypoint alerting as
you approach MA25B. This is shown on the Super NAV 5
page by a flashing active waypoint identifier. If the AUTO
scale factor was chosen for the Super NAV 5 page then
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 (figure 6-16).
The following steps would need to be performed if a
missed approach is required.
11. Upon reaching MA25B and not seeing the runway
you decide to perform a missed approach. Remember,
the KLN 90B will not automatically sequence past the
missed approach point. This is shown on the Super NAV
5 page by not showing any lines connecting waypoints
Rev 1
that are past the MAP. To perform the published missed
approach procedure, press D to bring up the direct-to
page. The default waypoint will be the first waypoint of
the missed approach procedure. In this case the first
waypoint is LAX. Confirm this waypoint as the direct to
waypoint and press E.
12. Upon reaching LAX, the KLN 90B will sequence to
the next waypoint in the missed approach procedure,
INISH. In this example, there is no holding pattern pub-
lished for the missed approach so you can expect further
instructions upon reaching INISH.
NOTE: If ATC gives you instructions for a missed
approach that is different from the published missed
approach procedure, it is always possible for you to select
a different direct to waypoint than the default direct to
waypoint.
0.3 oq
MA25Bñ|
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159 uv
.01NM |
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25LR
MA25B
Figure 6-16
1.9 oq
FREBYî|
z{-«} |
159 uv
.00NM=|
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FREBY
MA25B
Figure 6-15