33-41-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 WING ILLUMINATION LIGHT - REMOVAL/INSTALLATION
______________________________________________
 1.  General_______
 A. This procedure contains these tasks:
 (1)  
Wing Illumination Light - Removal

 (2)  
Wing Illumination Light - Installation

 TASK 33-41-02-004-001
 2.  Wing Illumination Light - Removal (Fig 401)_________________________________
 A. References
 (1)  
AMM 51-31-01/201, Seals and Sealing

 (2)  
SSM 33-41-10

 (3)  
WDM 33-41-11

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

 C. Light Removal
 S 864-015
 (1)  Do one of these steps to remove electrical power from the wing illumination light:
 (a)  
At the overhead panel, P5, set the switch to the off position and attach the DO-NOT-OPERATE tag.

 (b)  
Open each applicable circuit breaker and attach a DO-NOT-CLOSE tag:

 (c)  
On main power distribution panel, P6.

 S 144-012
 (2)  
Remove the sealant from around the light assembly
 (AMM 51-31-01/201).

 (3)  
Remove each screw and remove the light assembly.

 (4)
Clean the sealant from the airplane skin (AMM 51-31-01/201).

 S 024-013
 S 144-003
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 33-41-02
 ALL  ú ú 01 Page 401 ú Feb 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

WING ILLUMINATION LIGHT ASSEMBLY
A Exterior Light - Installation Figure 401
E66958
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 33-41-02
 ALL  ú ú 01 Page 402 ú Feb 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TASK 33-41-02-404-019
 3.  Wing Illumination Light - Installation (Fig 401)______________________________________
 A. Consumable Materials
 (1)  A00247 Sealant - BMS 5-95, Class B
 B. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 51-31-01/201, Seals and Sealing

 (3)  
SSM 33-41-10

 (4)  
WDM 33-41-11

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

 D. Light Installation
 S 394-016
 (1)  
Apply the sealant between the light assembly and the airplane skin (AMM 51-31-01/201).

 S 424-014

 (2)  
Install the light assembly with its screws.

 S 394-017

 (3)  
Apply the sealant around the edge of the light assembly (AMM 51-31-01/201).

 E. Light Test
 S 824-015
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 864-014

 (2)  
Remove each DO-NOT-OPERATE or DO-NOT-CLOSE tag.

 (a)  Close each circuit breaker that was opened.
 S 714-015
 (3)  
At the overhead panel, P5, set the switch for the wing illumination light to the on position.

 (a)  Make sure the light comes on correctly.

 (4)  
Set the switch to the off position.

 S 864-017

 (5)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 864-016
 F. Light Adjustment
 S 824-006
 (1)  If it is necessary, do this task: Wing Illumination Light - Light Adjustment (AMM 33-41-00/201).
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