GNC 420(A) Pilot’s Guide and Reference
SECTION 6
PROCEDURES
6-20
DO NOT USE FOR
NAVIGATION
Figure 6-56 Approach Mode
Refer to Figure 6-56 for the following steps.
6) At 2.0 nm from the FAF (TOP VOR), the GNC
420 switches from terminal mode to approach
mode (Figure 6-57). CDI scaling is tightened
from 1.0 to 0.3 nm, full scale deflection.
Figure 6-57 Approach Mode
7) When approaching the FAF, a waypoint alert
(‘NEXT DTK 214°’) appears in the lower right
corner (Figure 6-58).
Figure 6-58 Waypoint Alert
8) After crossing the FAF, the destination
sequences to the MAP (‘RW22’).
9) When approaching the MAP, a waypoint alert
(‘APPRCHING WPT’) appears in the lower right
corner.
10) After crossing the MAP, ‘SUSP’ appears above
the
OBS
Key (Figure 6-59), indicating that
automatic sequencing of approach waypoints
is suspended at the MAP. A ‘from’ indication
is displayed on the CDI and Default NAV Page,
but course guidance along the final approach
course continues. Do
not
follow this extended
course. Follow published missed approach
procedures using the
OBS
Key to initiate the
missed approach sequence, as outlined in this
section.
Figure 6-59 Final Approach
190-00140-20 Rev. K
Summary of Contents for GNC 420
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