(2)  
Indirect Ceiling Light - Ballast Installation

 B.  The ballasts are installed on the upper deck on the top side of the ceiling panels.
 TASK 33-28-02-004-001
 2.  Indirect Ceiling Light - Ballast Removal________________________________________
 A.  References
 (1)  
25-22-03/401, Upper Deck Ceiling Panels

 (2)  
SSM 33-28-09

 (3)  
WDM 33-28-11 thru 33-28-99

 B.  Access
 (1)  Location Zone
 200 Upper Half of Fuselage

 C.  Ballast Removal
 S 864-034
 (1) Remove electrical power from the indirect ceiling light:
 (a)  Open each applicable circuit breaker and attach the DO-NOT-CLOSE tag: 1) On the power distribution center panel, P414.
 S 014-037
 (2)  Lower the ceiling panel (AMM 25-22-03/401).
 (a)  
Disconnect the electrical connector.

 (b)  
Remove each screw that holds the ballast.

 TASK 33-28-02-404-007
 3.  Indirect Ceiling Light - Ballast Installation_____________________________________________
 A.  References
 (1)  AMM 24-22-00/201, Manual Control
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

INDIRECT CEILING LIGHT BALLAST
(EXAMPLE)

Upper Deck Passenger Compartment Lights - Component Location
Figure 401

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
E71100
A
747-400
MAINTENANCE MANUAL

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

 (3)  
SSM 33-28-09

 (4)  
WDM 33-28-11 thru 33-28-99

 B. Access
 (1)  Location Zone
 200 Upper Half of Fuselage

 C. Ballast Installation
 S 424-028
 (1)  Install the ballast:
 (a)  
Install the ballast with its screws.

 (b)  
Connect the electrical connector.

 (c)  
Install the ceiling panel (AMM 25-22-03/401).

 D. Ballast Test
 S 864-038
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 864-040

 (2)  
Remove each DO-NOT-CLOSE tag.

 (a)  Close each circuit breaker that was opened.
 S 714-041
 (3)  At the attendant's panel, set the switch for the indirect ceiling light to the dim position.
 (a)  Make sure the light comes on correctly.
 S 714-042
 (4)  
Set the switch to the bright position.

 (a)  Make sure the light becomes bright.

 (5)  
Set the switch to the usual position.

 S 864-018

 (6)  
Remove the electrical power if it is not necessary
 (AMM 24-22-00/201).

 S 864-043
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 UPPER DECK SIDEWALL LIGHTS - MAINTENANCE PRACTICES
__________________________________________________
 1.  General_______
 A. This procedure has this task:
 (1)  Sidewall Light - Lamp Replacement
 TASK 33-28-03-962-001
 2.  Sidewall Light - Lamp Replacement__________________________________
 A. References
 (1)  
　
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