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BENDIX/KING KLN 90B
Rev 5, April/2003 10521I05.TDC Page 2-1
SECTION II
INSTALLATION
2.1 GENERAL INFORMATION
This section contains general suggestions and information to consider before installation of the
KLN 90B GPS RNAV. Close adherence to these suggestions will assure optimum performance
from the equipment.
The conditions and tests required for TSO approval of this article are minimum performance stan-
dards. It is the responsibility of those desiring to install this article either on or within a specific type
or class of aircraft to determine that the aircraft installation conditions are within TSO standards.
The article may be installed only if further evaluation by the applicant documents an acceptable
installation and is approved by the Administrator.
2.2 UNPACKING AND INSPECTING EQUIPMENT
Exercise extreme care when unpacking the equipment. Make a visual inspection of the unit for
evidence of damage incurred during shipment. If a claim for damage is to be made, save the ship-
ping container to substantiate the claim. The claim should be promptly filed with the transportation
company. It would be advisable to retain the container and packaging material after all equipment
has been removed in the event that equipment storage or reshipment should become necessary.
2.3 EQUIPMENT INSTALLATION
2.3.1 AVIONICS COOLING REQUIREMENTS FOR PANEL MOUNTED EQUIPMENT
The greatest single contributor to increased reliability of all modern day avionics is to limit the max-
imum operating temperature of the individual units whether panel mounted or remote mounted.
While modern day individual circuit designs consume much less electrical energy, watts per cubic
inch dissipated within the avionics unit remains much the same due to the high density packaging
techniques utilized. Consequently, the importance of providing cooling to the avionics stack is still
with us today.
While each individual unit may or may not require forced air cooling, the combined heat load of
several units operating in a typical avionics location will significantly degrade the reliability of the
avionics if provisions for cooling are not incorporated in the initial installation. Failure to provide
cooling to the equipment will lead to increased avionics maintenance costs and may also void the
Honeywell warranty.
In the case of the KLN 90B, installation of a KA 33, (P/N 071-4037-XX), or equivalent cooling sys-
tem is required. Ram air cooling is not acceptable. For installation information on the KA 33 refer
to the KA 33 installation manual, P/N 006-01069-XXXX or Installation Bulletin 258.
2.3.2 KLN 90B MECHANICAL INSTALLATION
The KLN 90B installation will conform to standards designated by the customer, installing agency,
and existing conditions as to the unit location and type of installation. However, the following sug-
gestions will assure a more satisfactory performance from the equipment.
A. Plan a location on the aircraft panel so that the KLN 90B is plainly visible to the
pilot and so that he has complete access to all front panel controls. Check to be
sure that there is adequate depth behind the panel for the mounting rack and all
the connectors and cabling. Be sure that the mounting location is not close to
heater vents or other sources of high heat.
B. Refer to figure 2-3 for the panel cutout dimensions. Mark and cut the panel open-
ing.