5 - PROCEDURES
95
190-00357-00 Rev C
NOTE: Since this is not a GPS approach, the pilot
should be using the VLOC receiver, tuned to the correct
VOR (TOP) for navigation. However, as an example,
operation is essentially identical.
5. As you approach the IAF (D258G/LEBVY), a
waypoint alert (“Left to 353° in x sec”) appears
in the lower right corner of the screen. As the
distance (DIS) to the IAF approaches zero, the
alert is replaced by a turn advisory (“Turn to
353° now”).
6. Follow the arc, keeping the CDI needle cen-
tered. When using an autopilot, the course
select on the CDI (or HSI) must be periodically
updated with the desired track (DTK) to ensure
proper tracking through the arc. Whenever the
course select setting and desired track differ by
more than 10°, a “Set course to ###°” mes-
sage appears on the Message Page.
As you fly the DME arc, “Set Course to ###°”
alerts you to periodically adjust the course
select on the external CDI (or HSI).
7. The next point in the approach is an interme-
diate fix, labeled “D025G/DMARY”. As you
approach this intermediate fix, a waypoint alert
(“Right to 205° in x sec”) appears in the lower
right corner of the screen. As the distance to
this fix approaches zero, the alert is replaced
by a turn advisory (“Right to 205° now”). Dial
this course into the CDI (or HSI) using the OBS
knob and initiate a standard rate turn to this
course heading.
8. When within 45° of the final approach course
and the FAF is the TO waypoint, the 500W-
series unit switches from terminal mode to
approach mode. CDI scaling is tightened from
1.0 to 0.3 nautical mile, full scale deflection. At
2.0 NM from the FAF, CDI scaling is tightened
from 1.0 to the angular full scale deflection
(typically the angular full-scale deflection is
2.0°, but will be as defined for the approach.
9. As you approach the FAF, a waypoint alert in
the lower right corner (“Right to 214° in x
sec”) appears. Select this course on the CDI
(or HSI) using the OBS knob and turn to the
final course segment (FAF to MAP) heading.
As you approach the FAF, a “Right to 214° in
x sec” waypoint alert appears in the lower
right corner of the screen.
DME Arc Approach
