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Warning/Caution/Status indication incorrect.  Sensor defective. Annunciator panel defective. High resistance or open connection in the electrical wiring from the sensor.  Replace the sensor. Replace the annunciator panel. Do resistance and continuity tests between the indicator and the sensor. Repair the defective connection or wire. 

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Indicating Systems
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DA 40 Series

%  Maintenance Practices 
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%  1. General 
%  This Section tells you how to replace the main components of the central warning system. Refer to 
%  the equipment manufacturer's manuals for more data on the annunciator panel. Refer to the related 
%  Chapter for data on the warning sensors. 
%  Refer to Chapter 92 for the Wiring Diagrams. 
%  2. Remove/Install the Annunciator Panel 
%  A. Remove the Annunciator Panel 
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Detail Steps/Work Items  Key Items/References 
(1)  Remove the instrument panel cover.  Refer to Section 25-10. 
(2)  Disconnect the electrical connector from the annunciator panel. 
(3)  Remove the 4 cross-head screws which attach the annunciator panel to the instrument panel.  Hold the annunciator panel. 
(4)  Move the annunciator panel out of the instrument panel and lift it clear of the airplane. 

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% B. Install the Annunciator Panel %

Detail Steps/Work Items  Key Items/References 
(1)  Move the annunciator panel into its position in the instrument panel. 
(2)  Install the 4 cross-head screws which attach the annunciator panel to the instrument panel. 
(3)  Connect the electrical connector to the rear of the annunciator panel. 
(4)  Install the instrument panel cover.  Refer to Section 25-10. 
(5)  Do a test of the annunciator panel.  Refer to Paragraph 3 below. 

% % % 3. Test the Annunciator Panel
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Detail Steps/Work Items  Key Items/References 
(1)  Close front canopy and rear door. 
(2)  Put on a head-set.  To hear the aural alert. 
(3)  Set the ELECTRIC MASTER key switch to ON.  All lights on the annunciator panel must be flashed. The aural alert must be muted. 
(4)  Set the AVIONIC MASTER switch to ON. 
(5)  Switch the intercom ON.  To hear the aural alert. 
(6)  Press the 'acknowledge' button.  The PITOT, ECU A and ECU B caution lights must be on. The ALTERNATOR caution light must be on if the engine is not running. The LOW VOLTS caution light can be on or off. All other lights on the annunciator panel must be extinguished, and a short aural alert must be sounded. 
(7)  Set the AVIONIC MASTER switch to OFF. 
(8)  Set the ELECTRIC MASTER key switch to OFF. 

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Landing Gear
AMM

CHAPTER 32
LANDING GEAR

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Landing Gear
AMM

TABLE OF CONTENTS
CHAPTER 32
　
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