D.  
This procedure will be removed when the data is transfered to the Boeing Standard Wiring Practices Manual.

 TASK 24-31-01-006-001
 2.  Main Battery Connector Inspection Check (Fig. 601)_______________________________________
 A.  References
 (1)  
AMM 20-51-01/201, Torque Values

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 24-31-01/501, Main Battery

 (4)  
AMM 31-25-00/001, Clocks

 (5)  
IPC 24-31-01 Fig. 1

 (6)  
WDM 24-31-11

 (7)  
SSM 24-31-01

 B.  
Access

 (1)  
Location Zone 116 Area Between Nose Gear Well and Fuselage, RH

 C.  
Prepare for the Main Battery Connector Examination

 S 866-031
 CAUTION: THE MAIN BATTERY CONNECTOR MAY BE REMOVED WHILE THE AIRPLANE IS
_______ SUPPLIED WITH EXTERNAL POWER. EXTERNAL POWER PROVIDES PROTECTION FOR THE AC BUSES DURING MAIN BATTERY CONNECTOR REMOVAL. DO NOT REMOVE THE MAIN BATTERY CONNECTOR IF THE AIRPLANE IS SUPPLIED WITH IDG OR APU GENERATOR POWER. THE AC BUSES ARE NOT PROTECTED DURING MAIN BATTERY CONNECTOR REMOVAL IF THE IDG OR APU GENERATOR SUPPLIES POWER, AND DAMAGE TO THE AIRPLANE COULD OCCUR.
 (1)
Open these circuit breakers and attach a DO-NOT-CLOSE tag:

 (a)  
On the P414 panel:
 1) 414P18, MAIN BATTERY CHARGER

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A
747-400
MAINTENANCE MANUAL

A  SEE  A  CABLE CENTERED IN OPENING 
A 
B  INSPECTION GAUGE  A-A 0.437 INCH TYPICAL 4.50 INCHES 
1 B 0.385 |0.0001 INCH CONTACT BAR  2 B-B INCH 0.125 DIA |0.003  0.500 |0.003 INCH 0.370 |0.0001 INCH 
CONTACT AREA 
SEE  B  B 
LOCATOR PIN 

A 
2 1  MATERIAL: 1015 STEEL OR BETTER 125  SHIPPING PLUGS 
Battery Connector Inspection/Check Figure 601 (Sheet 1) 

L73221
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A
747-400
MAINTENANCE MANUAL

A  A  SEE  A  CABLE CENTERED IN OPENING 
SEE  C  A-A 
CONTACT BAR  AREA CONTACT 
SEE  B  B 
LOCATOR PIN 

A
INSPECTION GAUGE
B
4.50 INCHES
0.437 INCH TYPICAL
C B
0.125 DIA |0.003
0.385 |0.0001
INCH 0.500 |0.003 1
INCH  B-B
MATERIAL: 1015 STEEL OR BETTER  INCH
2 125 0.370 |0.0001 INCH
12
Battery Connector Inspection/Check
Figure 601 (Sheet 2)

L73222
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A
747-400 MAINTENANCE MANUAL
 (b)  On the P6 panel:
 1) 6K1, MAIN HOT BATTERY BUS CONTROL

 S 866-032
 (2)  
Make sure the BATTERY switch, on the P5 panel, is set to OFF and attach a DO-NOT-OPERATE tag.

 S 036-033

 (3)  
Disconnect the electrical connectors from the main battery.

 (a)  
Remove the sealing wire from the connector knob.

 (b)  
Turn the knob on the main battery connector (DM7423A) counterclockwise until the connector is free from the main battery receptacle.

 (c)  
Disconnect the electrical connector (DM7423B) from the main battery receptacle.

 D.  Main Battery Connector Examination
 S 766-065
　
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