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(5) Align the airplane to magnetic east. Adjust the E-W compensator magnet so
that the compass indicates an airplane
heading of 90°.
(6) Align the airplane to magnetic south. Adjust the N-S compensator magnet to
remove half of the error between what
is indicated and 180°.
(7) Align the airplane to magnetic west. Adjust the E-W compensator magnet to
remove half of the error between what
is indicated and 270°.
(8) Turn the airplane through 360°, record the
deviation at each 30° radial. Prepare a deviation
table that shows the corrections that must be
applied to each heading.
If large deviation occur when you
operate electrical equipment/systems,
the deviation table must also show the
corrections to apply to each 30° radial
when the that particular
equipment/system is operated.
(9) Install the deviation table in the compass card
holder next to the compass.
AIRCRAFT
Navigation
DA 40 Series
AMM
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AIRCRAFT
DA 40 Series
AMM
Navigation
Doc # 6.02.01
Rev. 5 34-25-00 Page 1
20 Sep 2007
Section 34-25
Integrated Gyro Instruments
1. General
This Section tells you about the instruments which show attitude and flight direction and which have
integrated gyros. These are:
% ) Turn coordinator.
) Attitude gyro (horizon).
) Directional gyro.
Refer to Section 34-28 for the remote-gyro compass system. Refer to the manufacturer's manuals for
more data about the integrated gyro instruments.
2. Description and Operation
% A. Turn coordinator
% Figure 1 shows the turn coordinator Electric Gyro Corp. 1394T100-(3Z) without autopilot pickup.
% Alternatively the 1394T100-(12RZ) or the 1394T100-(12RB) turn coordinator (with autopilot pickup)
% may be installed. It is located in the left-hand section of the instrument panel, see Chapter 31.
% The turn coordinator is an electrically-powered gyroscopic instrument. It operates when the main
bus is powered and the T&B circuit-breaker is closed. A warning flag shows when there is no power
% to the unit. The warning flag goes out of view when the turn coordinator has the correct power.
% The turn and bank coordinator shows the rate of rotation of the airplane about the vertical axis. The
% turn coordinator has markings for rate 2 turns.
% The turn coordinator has a slip indicator. A ball in a curved tube filled with fluid shows when the
airplane is slipping or skidding. When the ball is in the center, the turn is correctly coordinated.
AIRCRAFT
Navigation
DA 40 Series
AMM
Page 2
20 Sep 2007 34-25-00 Doc # 6.02.01
Rev. 5
TURN COORDINATOR
2 MIN
L R
OFF
No Pitch
Informaton
D.C.
ELEC.
Miniature Airplane
Standard Rate
Turn Line
Slip Indicator
Horizon Line
Power
Warning
Flag
10
10
20
10
10
20
Cage
To
Pull
Power Warning
Flag
Miniature Airplane
Caging Knob
Airplane
Adjustment
Knob
Horizon Line
Fixed Roll
Index
Rotating Roll
Scale
Display
10
10
20
10
10
20
Cage
To
Pull
Power Warning
Flag
Miniature Airplane
Caging Knob
Horizon Line
Fixed Roll
Index
Rotating Roll
Scale
Display
% Figure 1: Electric Gyro Corp. 1394T100-(R.) Turn Coordinator
Figure 2: BF-Goodrich AIM 1100-28L(0F) DIA Attitude Gyro
Figure 3: BF-Goodrich AIM 1100-28LK(0F) DIA Attitude Gyro (28 Volts)
BF-Goodrich AIM 1100-14(5) DIA Attitude Gyro (14 Volts)
AIRCRAFT
DA 40 Series
AMM
Navigation
Doc # 6.02.01
Rev. 5 34-25-00 Page 3
20 Sep 2007
B. Attitude Gyro (Artificial Horizon)
Figure 2 shows the BF-Goodrich AIM 1100-28L(0F) DIA attitude gyro. It is only approved for VFR
operation.
Figure 3 shows the BF-Goodrich AIM 1100-28LK(0F) DIA attitude gyro. It is approved for VFR and
IFR operation. The BF-Goodrich AIM 1100-14(5) DIA attitude gyro is identical to the AIM 1100-
28LK(0F) DIA (Figure 3), except that it operates on 14 V.
The attitude gyro is located in the left-hand section of the instrument panel, see Chapter 31.
The attitude gyro is an electrically-powered gyroscopic instrument. It operates when the essential
bus is powered and the HORIZON circuit-breaker is closed. It can also receive power from the
emergency battery, see Section 24-32. A warning flag shows when there is no power to the unit.
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