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altimeter to prevent errors due to
friction.
AIRCRAFT
Navigation
DA 40 Series
AMM
Page 206
20 Sep 2007 34-56-00 Doc # 6.02.01
Rev. 5
Detail Steps/Work Items Key Items/References
(9) Disconnect the test equipment and remove it
from the airplane.
B. Adjust/Test the SAE5-35
This adjustment ensures that the altitude code generated from the SAE5-35 is within 125 feet of
the altitude displayed to the pilot.
Detail Steps/Work Items Key Items/References
(1) Connect the test equipment. Refer to the equipment manufacturers'
manuals.
(2) Set the airplane altimeter to 1013.25 hPa
(29.92 inHg).
(3) Monitor the altitude code. Decrease the pressure
until the output code just changes to 20,000 ft.
(4) Make sure that the altimeter reading is within
± 125 ft of the encoder reading. If not, press the
increase button (behind slot A) or decrease
button (behind slot B) until the encoder reading is
within 30 ft of the altimeter reading.
Lightly tap the panel next to the
altimeter to prevent errors due to
friction.
(5) Increase the pressure until the output code just
changes to 0 ft.
(6) Make sure that the altimeter reading is within
± 125 ft of the encoder reading. If not, press the
increase button (behind slot A) or decrease
button (behind slot B) until the encoder reading is
within 30 ft of the altimeter reading.
Lightly tap the panel next to the
altimeter to prevent errors due to
friction.
(7) Do steps 2 to 5 again until both 20,000 ft and 0 ft
values are within the ± 125 ft tolerance.
(8) Operate the system through the range -1000 ft to
20,000 ft. Make sure that the altimeter and the
encoder are within the ± 125 ft tolerance.
Lightly tap the panel next to the
altimeter to prevent errors due to
friction.
(9) Disconnect the test equipment and remove it
from the airplane.
AIRCRAFT
DA 40 Series
AMM
Navigation
Doc # 6.02.01
Rev. 5 34-58-00 Page 1
20 Sep 2007
Section 34-58
Global Positioning System (GPS)
1. General
This Section tells you about the global positioning system (GPS) equipment that can be installed in the
DA 40. Refer to the manufacturer's manuals for more data about the equipment. Refer to Chapter 92
for the wiring diagrams.
Refer to Section 23-10 for more information about the NAV/COM system of the NAV/COM/GPS units.
The GPS equipment consists of the following items:
) GPS #1 receiver. One of the following GPS #1 receivers can be installed:
) Bendix/King KLN 89B.
) Bendix/King KLN 94.
) Bendix/King KMD 150.
) Garmin GNS 430.
) Garmin GNS 530.
) GPS #2 receiver. One of the following GPS #2 receivers can be installed:
) Garmin GNS 430.
) GPS annunciation control unit (optional).
) GPS annunciation unit (optional).
) GPS antenna(s).
2. Description and Operation
The GPS is a satellite-based long range navigation system. The GPS receiver provides exact latitude
and longitude position information. With its internal processing, the unit also provides ground speed,
altitude, track and bearing, and other navigation information.
The internal database of the GPS receiver contains information about airports, VOR’s, NDB’s,
intersections, DP/STAR’s and outer markers throughout the world. It also contains information about
land data (roads, bodies of water, cities, obstacles, railroad tracks), and other items of value to the
pilot.
AIRCRAFT
Navigation
DA 40 Series
AMM
Page 2
20 Sep 2007 34-58-00 Doc # 6.02.01
Rev. 5
ON/OFF
Knob
Data Card Cursor Button
Message
Button
OBS
Button
Nearest
Button
Clear
Button
Mounting
Screw
Right
Outer
Altitude
Button
Direct-to
Button
Enter
Button
Right
Inner
Knob
10
DDC
4.0 Rw14 CRCS
OBS ALT NRST D >CLR ENT PULL SCAN
APT
OFF ON
VOR NDB
nm
DDCf
>Leg
INT USR ACT NAV FPL CAL SET OTH
MSG
BENDIX/KING KLN 89B TSO
Figure 1: Bendix/King KLN 89B GPS receiver
AIRCRAFT
DA 40 Series
AMM
Navigation
Doc # 6.02.01
Rev. 5 34-58-00 Page 3
20 Sep 2007
A. Bendix/King KLN 89B GPS Receiver
Figure 1 shows the Bendix/King KLN 89B GPS receiver. It is located in the avionics rack in the
instrument panel, see Chapter 31.
The avionics bus or, if installed, the essential avionics bus supplies power to the GPS receiver. The
ALT/BAT switch and the AVIONICS MASTER switch must be set to ON to supply power through
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