钻石40飞机维护手册 DA 40 SERIES AMM 2(56)

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(2)  Set the ALT/BAT switch to ON.  The voltmeter must indicate battery voltage. 
WARNING: MAKE SURE THAT THE AREA OF THE PROPELLER IS CLEAR BEFORE YOU OPERATE THE STARTER MOTOR. PROPELLERS CAN CAUSE INJURY OR DEATH. 
(3)  Operate the starter motor.  You do not have to start the engine. 

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Section 24-32 % Emergency Battery System - Lycoming Engine
1. General
%  This Section tells you about the emergency battery system for airplanes with the Lycoming engine
%  installed. The emergency battery system is only installed in the IFR model. Regular maintenance of the emergency battery system is necessary.
Refer to Chapter 92 for the wiring diagrams.
2. Description
The emergency battery system consists of:
) An emergency battery pack.
) A sealed EMERGENCY switch.
The emergency battery pack consists of 28 alkaline dry batteries, 1.5 volts, size 'AA' (also known as 'Mignon'). Refer to the Equipment List in Section 6.5 of the Airplane Flight Manual for the approved battery type.
The GFRP tray which holds the 28 batteries is mounted under the instrument panel, on the co-pilot's side.
When all other sources of electrical power fail during flight, the EMERGENCY switch on the left side of the instrument panel is set to ON to use the emergency battery. It supplies the attitude gyro (horizon) and the flood light with power for at least 1 hour and 30 minutes.
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Figure 1: Emergency Battery Tray
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Trouble-Shooting
1. General
The table below lists the defects you could have with the emergency battery system. 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 
Batteries leaking.  Batteries expired.  Replace batteries. Clean all items that are contaminated. 
Voltage on the back side of the emergency switch less than 42 volts.  Batteries expired. Batteries have been used. One or more batteries installed incorrectly. Emergency battery system wiring defective.  Replace batteries. Replace batteries. Ensure correct polarity of each battery. Repair the emergency battery system wiring. 

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Maintenance Practices
1. General
This Section tells you how to replace batteries in the emergency battery pack. It also tells you how to test the emergency battery system.
Refer to Chapter 92 for the wiring diagrams.
2. Remove/Install the Batteries in the Emergency Battery Pack
A. Remove the Batteries in the Emergency Battery Pack
Detail Steps/Work Items  Key Items/References 
(1)  Disconnect the electrical plug on the right side of the battery tray. 
(2)  Remove the screw on the right side of the battery tray.  Hold the battery tray. 
(3)  Remove the battery tray clear of the airplane. 
(4)  Open the battery tray. 
(5)  Remove the batteries. 

CAUTION:  THE BATTERIES CANNOT BE RE-CHARGED. DO NOT TRY TO RE-CHARGE THE BATTERIES. IF YOU TRY TO RE-CHARGE THE BATTERIES, THEY CAN EXPLODE OR LEAK. 
CAUTION:  DISPOSE OF THE BATTERIES PROPERLY (ASK YOUR BATTERY DEALER FOR ADVISE). BATTERIES CONTAIN POISONS WHICH HARM THE ENVIRONMENT. DO NOT THROW THE USED BATTERIES INTO THE GARBAGE. DO NOT EXPOSE BATTERIES TO FIRE. DO NOT DISMANTLE BATTERIES. 
　
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