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APPENDIX C
Troubleshooting Q & A
218
190-00357-00 Rev E
What is the correct missed approach procedure? How
do I select the missed approach holding point?
The 500W-series unit does not automatically sequence
past the MAP. Waypoint sequencing to the first waypoint
in the missed approach procedure will be enabled when
the OBS key is pressed after crossing the MAP. All pub-
lished missed approach procedures must be followed, as
indicated on the approach plate.
To execute the missed approach procedure prior to the
MAP (not recommended), select the Active Flight Plan
Page and use the direct-to key (by pressing it twice) to
activate the missed approach portion of the procedure.
How do I re-select the same approach or activate a new
approach after a missed approach?
After flying all missed approach procedures, you may
reactivate the same approach for another attempt from the
Procedures Page. Once you have been given clearance for
another attempt, activate the approach from the Proce-
dures Page by highlighting “Activate Approach?” and then
pressing ENT. The 500W-series unit provides navigation
along the desired course to the waypoint and rejoins the
approach in sequence from that point on. See Section 4
- Flight Plans - Flight Plan Leg Selection for information on
activating a specific flight plan leg.
To activate a new approach for the same airport, select
the new procedure from the Procedures Page. To view the
Procedures Page, press PROC and turn the large right
knob to highlight “Select Approach?”. Press ENT and turn
the large right knob to highlight the new approach you
want to fly. Press ENT to select the approach, then select
the desired transition. Finally, highlight “Activate?” at the
bottom right corner of the screen and press ENT to acti-
vate the new approach.
To activate a new approach to a different airport, press
direct-to and select the desired airport using the small
and large right knobs. Press ENT to accept the selected
airport, then follow the steps in the preceding paragraph
to select an approach for the new airport. See Section 5 for
more information on selecting and activating approaches.
NOTE: Do not attempt to reactivate the same ap-
proach you’re currently on, prior to crossing the
missed approach point (MAP). If you attempt to
do so, an alert message (“Are you sure you want
to discontinue the current approach?”) appears.
If you still proceed with reactivating the ap-
proach, the 500W-series unit directs you back to
the transition waypoint and does NOT take into
consideration any missed approach procedures.