B.  Access
 (1)  Location Zone
 200 Passenger Compartment - Upper Deck

 C.  Replacement Procedure
 S 862-014
 (1)  Prepare for the lamp replacement:
 (a)  
Supply electrical power (Ref 24-22-00/201).

 (b)  
Make sure this circuit breaker is closed:

 1)  P414 Power Distribution Center - Left a) 414L18 LIGHT UPR DK CLG

 (c)  
On the crew rest lighting control panel, press the applicable crew rest lights switch to the on position.

 (d)  
Make sure the deck direct ceiling lights come on.

 (e)  
Identify the lamp(s) that do not come on.

 S 022-015
 (2)  Remove the lamp:
 (a)  Open this circuit breaker and attach a DO-NOT-CLOSE tag.
 1)  P414 Power Distribution Center - Left a) 414L18 LIGHT UPR DK CLG
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 (b) (c)  Remove the lens from the light assembly. 1) Turn the lens counterclockwise. 2) Pull the lens down until it is clear of the light.Remove the lamp from the light assembly.
 (3)  S 422-016Install the lamp in the light assembly.
 (4)  S 412-017Install the lens in the light assembly.
 (5)  S 862-018Close this circuit breaker and remove the DO-NOT-CLOSE tag. (a) P414 Power Distribution Center - Left 1) 414L18 LIGHT UPR DK CLG
 (6)  S 712-019Make sure the lamp comes on.
 (7)  S 862-013Remove the electrical power if it is not necessary (Ref 24-22-00/201).

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747-400
MAINTENANCE MANUAL

DIRECT CEILING LIGHT

Upper Deck Direct Ceiling Lights - Maintenance Practices

Figure 201

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747-400 MAINTENANCE MANUAL
 UPPER DECK READING LIGHTS - MAINTENANCE PRACTICES
_________________________________________________
 1.  General_______
 A.  This procedure contains the following tasks:
 (1)  
Reading light - lamp replacement.

 (2)  
Reading light - replacement.

 TASK 33-28-16-962-001
 2.  Reading Light - Lamp Replacement________________________________
 A.  References
 (1)  
24-22-00/201, Manual Control

 (2)  
IPC 33-29-01

 (3)  
SSM 33-28-03

 B.  Access
 (1)  Location Zone
 200 Upper Deck Passenger Compartment

 C.  Replacement Procedure
 S 862-002
 (1)  Prepare for the lamp replacement:
 (a)  
Supply electrical power (Ref 24-22-00/201):

 (b)  
Identify the reading lights that do not come on.

 (c)  
Open this circuit breaker and attach a DO-NOT-CLOSE tag.

 1)  P414 Power Distribution Center Left a) 414G17 READING LTS - UPPER DECK
 S 962-003
 (2)  Replace the lamp:
 (a)  
Remove ceiling panel to get access to the light assembly.

 (b)  
Remove (2) retaining screws and cover from the back of the light assembly.

 (c)  
Release spring retaing clips and remove light reflector assembly.

 (d)  
Remove old lamp from reflector.

 (e)  
Install new lamp into reflector.

 (f)  
Install reflector into light assembly. Make sure spring retaining clips are properly seated.
　
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