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2-7
Rev 1
1. Insert the KLN 90B insertion/removal tool (supplied
with unit) in the small hole located on the right side of the
front of the unit (figure 2-9). A standard 3/32 inch Allen
wrench may also be used.
2. Turn the tool counterclockwise until the locking mech-
anism becomes loose and then continue turning counter-
clockwise until it just barely begins to become snug. Do
not turn so far counterclockwise that the mechanism
starts to bind and can no longer be turned.
3. The KLN 90B should now be loose from the rack.
Pull the unit out of the rack by pulling on the sides of the
radio’s front panel. DO NOT REMOVE BY PULLING ON
THE KNOBS.
4. Remove the old database cartridge by pulling it
straight out the back of the KLN 90B (figure 2-10).
5. Remove the new database cartridge from its shipping
container. Note that the label on the cartridge indicates
PUSH
ON
APT
VOR
NDB
INT
SUPL
ı
MSG
CLR
ENT
D
BRT
NAV
D/T
ACTV
REF
CTP.
KLN 90B TSO
GPS
FRONT LUG UP
AND BACK LUG DOWN
CALC
STAT
SETUP
OTHER
NAV
FPL
MODE
TRIP
CRSR
CRSR
PULL
SCAN
ALT
Figure 2-9
2.4.2 Cartridge Exchange Updating of the Database
To exchange the KLN 90B cartridge it is necessary to
remove the KLN 90B from the aircraft’s instrument panel.
The KLN 90B and the mounting rack have been designed
to provide for easy removal. Follow these steps to update
the database cartridge.
INSERT TO HERE
North American
P/N: 071-1469-00
AIRAC No. 8811
Document: 723-8088-11
Figure 2-10