Updating the data base – Bendix Commercial Vehicle Systems Bendix/King Global Positioning System KLN 35A User Manual
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Data Base
2-4
Effective Date 5/95 006-08791-0000 Rev 0
Data Base
Chapter 2
2.4. UPDATING THE DATA BASE
The information stored in the data base would eventually become
obsolete if there wasn’t some means to update it. For example, new
airports open, navaids can move or change frequency,
communication frequencies can change, and on and on.
The data base is updated by means of a 3.5-inch diskette supplied by
AlliedSignal and an IBM-compatible personal computer. This method
does not have to involve removing the KLN 35A from the aircraft’s
instrument panel. A jack, usually mounted in the aircraft’s instrument
panel, provides a means of interfacing the KLN 35A with the comput-
er via an interface cable. The diskettes are not returned to
AlliedSignal.
Every 28 days, AlliedSignal receives new NavData™ information
from Jeppesen Sanderson. This information is processed and down-
loaded onto diskettes. AlliedSignal makes the update service
available to you in a choice of several subscription or random update
programs. See
for details on these programs.
NOTE: AlliedSignal sends the update so that it arrives prior to the
next effective date. The new update may be installed any time prior
to the effective date and the KLN 35A will use the previous data up to
the effective date and automatically begin using the new data on the
effective date.
In order to use the update program you must have access to a com-
puter having a disk drive capable of utilizing 3.5-inch 1.44 megabyte
high density diskettes. This computer also needs to have an avail-
able COM 1 or COM 2 serial port. If you wish to perform updates in
the cockpit, an optional PC Interface kit must be used. Included in
the kit is an interface cable that plugs into both the computer and into
the data loader jack. The data loader jack is included with the KLN
35A installation kit and is typically installed in the aircraft’s instrument
panel.
CAUTION: The data base must be updated only while the air-
craft is on the ground. The KLN 35A does not perform any
navigation function while the data base is being updated. Since
a data base update takes approximately 10 minutes it is a good
idea to turn off all electrical equipment on the aircraft except for
the KLN 35A to avoid running down the aircraft battery.