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 (1)  Location Zone 200 Forward Upper Deck - Passenger Compartment.
 C. Procedure
 S 864-002
 WARNING: DO NOT TOUCH THE POWER SUPPLY FOR 10 MINUTES AFTER YOU REMOVE
_______ THE POWER. AN ELECTRICAL SHOCK FROM THE HIGH VOLTAGE IN THE POWER SUPPLY CAN CAUSE INJURY TO PERSONS.
 (1)  Open this circuit breaker and attach a DO-NO-CLOSE tag:
 (a)  
P6 Main Power Distribution Panel
 1) 6L31 ANTI COLL LTS RED

 (b)  
Find the ceiling panel at station 568 (the fifth ceiling panel forward of the midrange lowered ceiling).

 NOTE: Some airplanes have a panel installed in the
____ ceiling panel to get access to the power supply.
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A
747-400
MAINTENANCE MANUAL

CABLE TO THE UPPER BEACON MOUNTING BOLT LIGHT (4 LOCATIONS)

UPPER BEACON LIGHT POWER SUPPLY

Upper and Lower Beacon Light Power Supply Installation
Figure 401 (Sheet 1)

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747-400
MAINTENANCE MANUAL

AIR CONDITIONING BAY  LOWER BEACON 
ACCESS DOORS  LIGHT POWER 
SUPPLY 
SEE  B 
ACCESS 
PANEL 

FWD
MOUNTING BOLT
POWER (4 LOCATIONS)
SUPPLY
ELECTRICAL CONNECTORS
LOWER BEACON LIGHT
LOWER BEACON LIGHT POWER SUPPLY
B
Upper and Lower Beacon Light Power Supply Installation Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
 (c)  
AIRPLANES WITH AN ACCESS PANEL; Open the access panel in the ceiling panel.

 (d)  
AIRPLANES WITHOUT AN ACCESS PANEL; Remove the ceiling panel (AMM 25-22-03/401).

 S 004-032
 (2)  Do these steps to remove the power supply:
 (a)  
Disconnect the electrical connector.

 (b)  
Remove the mounting bolts.

 (c)  
Remove the power supply.

 TASK 33-44-09-404-006
 3.  Installation (Upper Beacon Light Power Supply) (Fig. 401)______________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 25-22-03/401, Upper Deck Ceiling Panel

 (3)  
AIPC 33-44-09 Fig. 2

 (4)  
SSM 33-44-01

 B. Access
 (1)  Location Zone 200 Forward Upper Deck, Passenger Compartment
 C. Procedure
 S 404-033
 (1)  Do these steps to install the power supply:
 (a)  
Put the power supply in its position.

 (b)  
Install the mounting bolts.

 (c)  
Connect the electrical connector.

 S 414-009
 (2) Close and latch the access panel (AMM 25-22-03/401).
 D. Installation Test
 S 864-010
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 864-011

 (2)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

 (a)  P6 Main Power Distribution Panel 1) 6L31 ANTI COLL LTS RED
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