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Indication of instrument not
reliable.
Related circuit-breaker (T&B or
HORIZON or DG) open or
defective.
Power supply wiring defective.
Ground connection defective.
Instrument defective.
Close or replace the circuitbreaker.
Do a test for the correct voltage
at the instrument. Repair the
power supply wiring/connector.
Do a test for correct ground
connection. Repair the ground
wiring/connector.
Replace the instrument.
Instrument is sluggish. Mechanism worn or dirty. Replace the instrument.
AIRCRAFT
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DA 40 Series
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Page 102
20 Sep 2007 34-25-00 Doc # 6.02.01
Rev. 5
2. Vacuum Driven Directional Gyro
The table below lists the defects you could have with the integrated vacuum driven directional gyro.
If you have the trouble detailed in the Trouble column read across to the Possible Cause column. Then
do the repair given in the Repair column.
% Trouble Possible Cause Repair
% Indication of instrument not
% reliable.
Components of the vacuum
system dirty or defective.
% Instrument defective.
Refer to Chapter 37.
%
Replace the instrument.
% Instrument is sluggish. Mechanism worn or dirty. Replace the instrument.
AIRCRAFT
DA 40 Series
AMM
Navigation
Doc # 6.02.01
Rev. 5 34-25-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
This Section tells you how to remove/install the integrated gyro instruments.
CAUTION: Be specially careful when you work on or move gyroscopic instruments.
Make sure that the gyro stops turning before you start to remove the
instrument. Use only the correct shock-proof container for shipping. Mark
the container ‘VERY FRAGILE’ ‘HANDLE LIKE EGGS’.
2. Remove/Install an Integrated Gyro Instrument
A. Remove an Integrated Electrical Gyro Instrument
Detail Steps/Work Items Key Items/References
(1) Pull the related circuit-breaker. T&B for the turn & bank indicator.
HORIZON for the attitude gyro.
DG for the directional gyro.
(2) Remove the instrument panel cover. Refer to Section 25-10.
(3) Dis-connect the connector at the rear of the
instrument.
(4) Remove the screws which attach the instrument
to the instrument panel.
Hold the instrument!
(5) Remove the instrument from the instrument
panel.
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DA 40 Series
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Page 202
20 Sep 2007 34-25-00 Doc # 6.02.01
Rev. 5
B. Install an Integrated Electrical Gyro Instrument
Detail Steps/Work Items Key Items/References
(1) Put the instrument in position in the instrument
panel.
(2) Install the screws which attach the instrument to
the instrument panel.
(3) Connect the connector at the rear of the
instrument.
(4) Install the instrument panel cover. Refer to Section 25-10.
(5) Set the related circuit-breaker. T&B for the turn & bank indicator.
HORIZON for the attitude gyro.
DG for the directional gyro.
C. Remove an Integrated Vacuum Gyro Instrument
% Detail Steps/Work Items Key Items/References
% (1) Remove the instrument panel cover. Refer to Section 25-10.
(2) Disconnect the vacuum hoses at the rear of the
% instrument.
%
(3) Disconnect the electrical connector for the
% instrument light.
%
% (4) Remove the screws which attach the instrument
% to the instrument panel.
Hold the instrument!
(5) Remove the instrument from the instrument
% panel.
%
AIRCRAFT
DA 40 Series
AMM
Navigation
Doc # 6.02.01
Rev. 5 34-25-00 Page 203
20 Sep 2007
D. Install an Integrated Vacuum Gyro Instrument
% Detail Steps/Work Items Key Items/References
(1) Put the instrument in position in the instrument
% panel.
%
(2) Install the screws which attach the instrument to
% the instrument panel.
%
(3) Connect the electrical connector for the
% instrument light.
%
(4) Connect the vacuum hoses at the rear of the
% instrument.
%
% (5) Install the instrument panel cover. Refer to Section 25-10.
AIRCRAFT
Navigation
DA 40 Series
AMM
Page 204
20 Sep 2007 34-25-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Navigation
Doc # 6.02.01
Rev. 5 34-28-00 Page 1
20 Sep 2007
Section 34-28
Gyro-Compass System
1. General
This Section tells you about the gyro-compass system which can be installed in the DA 40. Refer to
the manufacturer's manuals for more data about the equipment.
　
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