Bendix/King KFC 400 - VNAV Descent

VNAV Descent to Arrival Fix
1. Three different methods of VNAV
operation utilizing the capabilities of
the KNS 660XFC 400 may be used
depicted by vertical profiles
A, 6, and
C. In this example the aircraft is
currently at
23,000 ft. and has been
requested to cross HOOZE intersec-
tion at 6,000 ft.
to provide
VNAV descents. They are
m
1A. The first method is flown by
verifying that HOOZE
is the current
“TO” flight plan waypoint and selecting
6,000 ft on the
KAV 485. The descent
angle may be viewed on the
KCI 310/A or the EHSl or on the
KNS 660’s NAV 2 page. The
KCI 310/A will display ANG to indicate
the vertical deviation indicator is dis-
playing angle while the EHSI will
display
ANG VNV. Then push the
VNAV button on the KMS 446. The
existing vertical mode will be disen-
gaged,
VNAV will engage, start the
aircraft’s descent and altitude arm will
be engaged in order to capture 6,000
ft. at HOOZE.
1B. The second method assumes the
crew has decided to reach 6,000 ft
prior to reaching HOOZE. The
KNS 660’s NAV 2 page is selected,
HOOZE is verified as the WPT, 6,000
ft is selected either on the KNS 660 or
the
KAV 485 and an offset (-8.0 NM)
is selected on the KNS 660. Negative
off sets cause altitude capture before
the waypoint, positive offsets cause
altitude capture after waypoint
passage.
At this time the actual
descent angle may be viewed.
If it is
acceptable, the
VNAV button on the
KMS 446 is pushed, starting the
descent and engaging altitude arm in
order to capture
6,000 ft 8.0 NM prior
to reaching HOOZE.
L
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