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_______ EVAPORATE. INSULATION BLANKETS WHICH TOUCH THE CORROSION INHIBITING COMPOUNDS BEFORE COMPLETE SOLVENT EVAPORATION WILL CAUSE DAMAGE TO THE BLANKETS. BLANKETS DAMAGED BY CORROSION INHIBITING COMPOUNDS CANNOT BE CLEANED AND MUST BE REPLACED.
 (f)  Apply corrosion inhibiting compounds any exposed areas (AMM 51-24-13/701).
 NOTE: Corrosion inhibiting compound BMS 3-23 requires 4 hours
____ standing time after application to let the solvents evaporate. BMS 3-26 and BMS 3-29 requires 6 hours standing time after application to let the solvents evaporate.
 NOTE: Corrosion inhibiting compounds Dinatol AV8, LPS Hardcoat
____ and Zip Chem ZC023 dries tack free in 1 hour. Accelerated drying time of 6 minutes can be obtained when warm air is applied over the area. Warm air is air with a temperature of lower than 120 degrees F.
 (g)  Install the insulation blanket and fastener (AMM 25-59-05/601).
 S 434-023
 (4)  
Connect the electrical connectors to the APU battery:

 (a)  
Connect the electrical connector (DM7432B) to the APU battery receptacle.

 (b)  
Put the APU battery connector (DM7432A) into the receptacle on the APU battery.

 (c)  
Turn the knob on the connector clockwise with your hand until it is tight.

 (5)  
Remove the DO-NOT-OPERATE tag from the BATTERY switch.

 S 864-065

 (6)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
On the P183 panel:
 1) APU BAT CHGR
 2) APU BATTERY BUS

 (b)  
On the P6 panel:
 1) 6J9, APU BAT BUS APU BAT-CONT

 (7)  
Make sure the APU battery operates correctly on the next APU start.

 S 864-016
 S 714-018
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 24-31-06
 ALL  ú ú 04 Page 405 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 864-028
 (8) Remove electrical power, if it is not necessary (AMM 24-22-00/201).
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 24-31-06
 ALL  ú ú 05 Page 406 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 APU BATTERY - ADJUSTMENT/TEST
_____________________________
 1.  General________
 A.  This procedure contains a task to do the operation test of the APU battery (M7432).
 B.  The APU battery is installed on the E-33 equipment rack with the APU battery charger. The E-33 equipment rack is on the left side of the aft passenger cabin. Access to the E-33 equipment rack is through the E-33 access door.
 TASK 24-31-06-705-001
 2.  Operational Test of the APU Battery____________________________________
 A.  References
 (1)  
24-22-00/201, Manual Control

 (2)  
45-10-00/201, Central Maintenance Computer System

 (3)  
IPC 24-31-06 Fig. 1

 (4)  
WDM 24-31-21

 (5)  
SSM 24-31-02

 B.  
Access

 (1)  
Location Zone
 271 Passenger Cabin, LH

 C.  
Do a Test of the APU Battery

 S 865-002
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 715-003

 (2)  
Do a test of the APU battery:

 (a)  
Get access to the maintenance page for the electrical system (AMM 45-10-00/201).

 (b)  
Make sure the DC-Volts for the APU battery is more than 24 volts.

 (c)  
Make sure the DC-Amps is in the positive CHG mode.

 (d)  
Set the STANDBY POWER switch, on the P5 panel, to BAT.

 (e)  
Make sure the main EICAS display operates correctly.

 (f)  
Make sure the advisory EICAS message BAT DISCH APU shows on the main EICAS screen.

 (g)  
Set the STANDBY POWER switch, on the P5 panel, to AUTO.

 (3)  
Remove electrical power, if it is not necessary (AMM 24-22-00/201).
　
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