CHAPTER 1 - KLN 90B SYSTEM COMPONENTS A basic KLN 90B system consists of a panel mounted KLN 90B GPS sensor/navigation computer, a data base cartridge, and an antenna. An altitude input is required to obtain full navigation and operational capabilities. Additional system components may be added or interfaced to the KLN 90B which increase its features and
capabilities. Some of these optional components include an external course deviation indicator (CDI) or HSI, RMI, fuel management system, air data system, ARTEX ELS10 emergency locator transmitter (ELT), autopilot, and external annunciators.
HSI
KLN 90B SYSTEM
EHSI
OR
N
ALT
HDG
ALT
HDG
GS
NAV
APR
NAV
APR
BC
30
30 W
24
W
TRIM
AP
TEST
AP ENG
KAP 150
UP RN
ı
RC
BC PC
CRSR
RMI
APT VOR NDB INT SUPL
33
30
W
N
33 30
24 21
3
12
A D F
E
RS 232 OUTPUT
OR
N
D F
24
ENT
PULL SCAN
W
NAV D/T ACTV REF CTR
6
21
S
12
15
S
NAV ı
WPT ALERT MESSAGE
GPS APR
NAV
B
KI 229 ARTEX ELS-10 ELT
A D F
15
ARINC 429 or RS 232 INPUT
24
30
W 24
SELECTED COURSE
21
S
LEFT/RIGHT D-BAR
15
21
S
AUTOPILOT DN
E
ARINC 429 or RS 232 INPUT
15
KI 206 EHI 40/50
6
HEADING
ı
ı
A
MOVING MAP DISPLAYS
21
CLR
OBS
S
D
FR
12
ALT
E
MSG
G S
KI 525A
3
COMPATIBLE FUEL MANAGEMENT SYSTEM
RS 232 INPUT
CALC STAT SETUP OTHER
6
ALTITUDE
NAV FPL MODE TRIP
TO
12
CRSR
GRAY CODE
BRT
$=KOSH |=KOSH +++++Ê+++++|WITTMAN DIS 683nm| GS 193kt| ETE 3:34|N 43^59.06' BRG 303^|W 88^33.42' NAV 1|enr-leg |APT 1
1
3 N A V
GS
E
12
KLN 90B TSO
PUSH ON
M L S
11.5
3
ADF 2
YD
GPS
ı
N
33
GS
E
KA 92 OR KA 91 ANTENNA
3
6
11/33V
HDG
N
33
33
15
NAV GS
12.6 NM
359
6
REQUIRED FOR ALL INSTALLATIONS REQUIRED FOR ALL IFR APPROACH INSTALLATIONS OPTIONAL AIRCRAFT POWER
CDI
OR
ı
AZ
KNI 582
REMOTE ANNUNCIATORS
GPS CRS
REMOTE SWITCH/ ANNUNCIATORS
AIR DATA ALTITUDE ALERT AUDIO
The database cartridge is an electronic memory containing a vast amount of information on airports, navaids, intersections, special use airspace, and other items of value to the pilot. The database is designed to be easily updated by the user by using a laptop computer and AlliedSignal furnished 3.5 inch diskettes. The database may also be updated by removing the obsolete cartridge and replacing it with a current one.
The KLN 90B panel mounted unit contains the GPS sensor, the navigation computer, a CRT display, and all controls required to operate the unit. It also houses the data base cartridge which plugs directly into the back of the unit.
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KA 91 GPS Antenna
KA 92 GPS Antenna
Two GPS antennas can be used with the KLN 90B. One is the KA91 and the other is the KA 92. The KA 92 is used with new production KLN 90Bs and the KA 91 is used with units that have been upgraded from either a KLN 90 or a KLN 90A. They are “patch” antennas designed to always be mounted on the top of the aircraft.
Compatible air data systems are available from Bendix/King and Shadin Co. An air data system is capable of providing the KLN 90B with true air speed data which is used for wind determination. The Shadin air data system also will convert heading data from the Bendix/King KCS 55A and some other compass systems to a format that allows wind calculations to be fully automatic.
The KLN 90B has analog outputs to drive the left-right deviation bar of most mechanical CDIs and HSIs. In addition, it has digital outputs to automatically drive the course pointer and display flight plan waypoints on the Bendix/King EHI 40 and EHI 50 electronic HSIs.
Altitude may be provided to the KLN 90B from an encoding altimeter, blind encoder, or one of the air data computers mentioned above. Altitude is used as an aid in position determination when not enough satellites are in view. Altitude is also used in several altitude related features such as three dimensional special use airspace alerting, height above airport, and altitude alerting.
The Bendix/King KI 229 and KNI 582 RMIs may be interfaced to the KLN 90B to provide a display of magnetic bearing to the waypoint. The NAV mode of the Bendix/King KFC 150, KAP 150, KAP 150H, KAP 100, KFC 200, KAP 200, KFC 250, KFC 275, KFC 300, KFC 325, KFC 400 and KFC 500 Flight Control Systems may be coupled to the KLN 90B. Many other autopilots may also be coupled to the KLN 90B. Actual autopilot performance and capability when coupled to the KLN 90B may vary significantly from one autopilot model to another.
Some installations may require remote annunciators to be mounted in the aircraft panel in order to indicate the status of certain KLN 90B functions. Specifically, the KLN 90B has outputs to provide annunciation for waypoint alert and message. In installations where the KLN 90B will be used for approaches, the installations are more complicated. External switches and annunciators are required to change approach modes as well as how the KLN 90B defines the course to the active waypoint. Selected course is generally required to be provided to the KLN 90B through an HSI, CDI or EFIS.
Certain Digiflo™ and Miniflo™ fuel management systems manufactured by Shadin Co. Inc. as well as certain fuel computers manufactured by ARNAV Systems, Inc. and SHELTECH LTD interface with the KLN 90B. These interfaces allow the pilot to view fuel related parameters calculated by the KLN 90B such as how much fuel will be remaining when the aircraft lands at the destination. With certain Shadin fuel management systems it is possible to update the fuel on board through the KLN 90B. In these cases a separate panel mounted interface to the fuel management computer is not required.
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