BendixKing KLN 89B - Pilots Guide - Manual (Page 130)

desired vertical speed is reached, position the cursor over the vertical
speed field and VNAV will commence. When VNAV begins, the top
of the page displays an advisory altitude. Descending at the vertical
speed displayed on line 4 should keep you very close to the VNAV
advisory altitude, but you may need to make slight adjustments to
stay right on pace.
A better way yet to initiate VNAV is to program a desired vertical
speed to use for the descent, after you have entered the desired alti-
tude, waypoint, offset, and groundspeed. To program a vertical
speed, do the following step:
6. Use the right outer knob to move
the cursor to the vertical speed
field, and then enter the desired
value (figure 4-64). Vertical
speed may be selected in incre-
ments of 100 feet per minute or
10 meters per minute. If the time to begin your descent is greater
than one hour, Vnv Armed will now be displayed on the top line
of the page. If the time is less than one hour, the top line displays
a countdown to the time to begin the descent.
7. Return to any desired page for now by pressing the
A
button
once. Alternatively, you may turn off the
B
and use the outer
knob to change pages. Approximately 90 seconds before the
time to begin descent, the message prompt will flash. When you
view the Message page, it will display Vnv Alert. This is
notification for you to view the ALT 2 or NAV 1 page (see section
4.4.3) because it is getting close to the time to begin your
descent.
8. When the countdown timer
reaches 0:00, the time will be
replaced with an advisory altitude
(figure 4-65). Begin your descent
at a rate such that the altitude
displayed on your altimeter matches the advisory altitude.
NOTE: During your descent, check your actual groundspeed to veri-
fy that it is similar to the one you entered on the ALT 2 page. If it is
different, you should enter your actual groundspeed so that the
VNAV function will work properly.
If you make any changes to the “from” or “to” altitudes, the VNAV
waypoint, or the waypoint offset once VNAV has been armed, or is
actually in progress, the VNAV status will change to “Inactive”.
KLN 89/KLN 89B Pilot’s Guide Advanced GPS Operation
4-19
Advanced GPS Operation
Chapter 4
APT VOR NDB INT USR ACT NAV FPL CAL SET OTH
åå.ånm|Vnv in 3:25
ееееее| 07500 to :01900
Leg|KDBQ : -02nm
*CRSR*|GS: 160 -0800fpm
Figure 4-64
APT VOR NDB INT USR ACT NAV FPL CAL SET OTH
åå.ånm|Vnv Alt 7500
ееееее| 07500 to :01900
Leg|KDBQ : -02nm
*CRSR*|GS: 160 -0800fpm
Figure 4-65