f. The Air Data Pages. When interfaced with
the AETM, the KLN 90B will display real time air data
parameters such as True Airspeed (TAS), Static Air
Temperature (SAT), Total Air Temperature (TAT),
Mach number, density altitude, and pressure altitude.
The KLN 90B will also calculate and display real time
wing data (magnitude and direction). The OTH 9 and
OTH 10 pages are used to display air data information.
(1) Figure 3D-79 depicts the OTH 9 page
Figure 3D-79. OTH 9 Page
These air data pages receive inputs from
air data sensors and display real time air
data information. They are independent of
the calculator pages that rely on manual
(a) The TAS of the aircraft through the
surrounding air mass.
(b) MACH the ratio of the true airspeed
to the speed of sound at a particular flight condition.
(c) The Tailwind (TLWND) component of
the wind, if applicable.
(d) The (HDWND) component of the
wind, if applicable.
(e) The Wind (WIND) direction relative to
true North and the wind speed.
(2) OTH 10 Page. The OTH 10 page
displays the following information.
(a) SAT the actual temperature of the
(b) TAT the air temperature including
heat rise due to compressibility. This is the
temperature measured directly by the OAT probe.
nearest 100 feet.
(d) Density altitude (DEN) to the nearest
3D-24. THE SETUP PAGES.
a. The Setup 0 Page. The SET 0 page is used
for computer updating of the database. Update
information is sent on 3.5-inch disks. A computer is
used via the data loader jack installed in the
instrument panel. This is normally a maintenance
The KLN 90B does not perform any
navigation functions while the database is
The disks can only be used to update one
KLN 90B, although they can be used to
update a specific unit numerous times.
The first time the disks are used in an
update operation, a unique identification
code from the KLN 90B being used is
uploaded to the disks. These disks may be
used in this specific KLN 90B an unlimited
number of times if switching between the
North American and International data-
bases occurs during one update cycle.
These disks, however, may not be used to
update other KLN 90B's. This update
Sanderson is properly compensated for
b. The Setup 1 Page. The Setup 1 page is
used to manually update the position of the KLN 90B
and enter a groundspeed for use of the KLN 90B in the
take home mode. Refer to Figure 3D-80. Since the
KLN 90B stores its position and other required
parameters in memory when power to the unit is
removed, it is seldom necessary to aid the unit in
reaching a NAV ready status. In order for the unit to
reach a NAV ready condition, it is necessary to meet
the same conditions outlined in Paragraph 3D-7,