What is the correct missed approach procedure? How do I select the missed
approach holding point?
To comply with TSO specifications, the GPS 155 will not automatically sequence
to the missed approach holding point. The first waypoint in the missed approach
procedure will be displayed as the next approach waypoint when the pilot performs a
direct-to AFTER crossing the MAP, which the pilot may activate when authorized. All
published missed approach procedures must be flown before activating navigation to
the holding point. To begin the missed approach procedure prior to the MAP, the
GPS APPR switch must be released from the ‘ARM’ position to disarm the approach
and begin transition of the CDI to the 1.0 nm scale.
To activate navigation to the first missed approach waypoint after crossing the
MAP, press
D
, then
E
. The GPS 155 will provide direct navigation to the holding
point. If you do not have direct clearance to the holding point, set the GPS SEQ
switch to the HOLD position until you have intercepted the inbound course to the
holding point. See page 68-69 for more on missed approaches.
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 active route page. Once you have been given
clearance for another attempt, select the starting waypoint from the active route list
by highlighting the waypoint identifier and pressing
D
, followed by
E
. The GPS
155 will provide direct navigation to the selected waypoint and rejoin the approach
in sequence from that point on. If you have disarmed the previous approach, remem-
ber to set the GPS APPR switch to the ‘ARM’ position.
To activate a new approach, you must select the new procedure from the
approach select page. To view the approach select page, press
R
and rotate
O
until the approach select page appears. Press
C
and rotate
O
to highlight the new
approach you want to fly. To activate the new approach, press
E
and select the IAF,
if necessary. See page 69 for more on reactivating an approach.
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APPENDIX F
Troubleshooting Q & A
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