(4)  
Install the fairing as follows:

 -Install the fasteners
 -Connect the electrical connectors
 -
Do a Test of the lights

 -
Do a Test of the bonding resistance

 -Apply sealant to the space between the skin(s)
 B.  The navigation lights are installed in the forward fairing wingtip. To repair the lights, you must remove the fairing.
 TASK 57-23-01-004-001
 2.  Wingtip Forward Fairing Removal (Fig. 401)_______________________________
 A.  References
 (1)  IPC 57-23-01 Fig. 1
 B.  Access
 (1)  
Location Zone
 538 Wingtip, Left
 638 Wingtip, Right

 (2)  
Access Panel 538B Access Door - Navigation Light Fairing, Left 638B Access Door - Navigation Light Fairing, Right

 C.  Procedure
 S 864-002
 (1)  For the left wing, open the 6L28 EXTERIOR LIGHT L WING CONT circuit breaker on panel P6.
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747-400
MAINTENANCE MANUAL

MID FAIRING AFT OUTBOARD SECTION
Wingtip Forward Fairing Installation
Figure 401

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747-400 MAINTENANCE MANUAL
 S 864-003
 (2)  
For the right wing, the open 6L29 EXTERIOR LIGHT R WING circuit breaker on P6.

 S 864-004

 (3)  
Open the 6L32 EXTERIOR LIGHT BEACON STROBE circuit breaker on panel P6.

 S 014-005

 (4)  
Open the access panel 538B or 638B.

 S 034-006

 (5)  
Disconnect the electrical connectors from the strobe and navigation lights.

 S 024-007

 (6)  
Remove the external fasteners around the fairing perimeter and then remove the fairing.

 S 034-008

 (7)
Put a cover on the open area of the structure and the equipment.

 TASK 57-23-01-404-009
 3.  Wingtip Forward Fairing Installation (Fig. 401)____________________________________
 A. Consumable Materials
 (1)  A00247 Sealant - BMS 5-95
 B. References
 (1)  
20-22-01/601, Electric Bonding

 (2)  
24-22-00/201, Manual Control

 (3)  
IPC 57-23-01 Fig. 1

 C. Access
 (1)  
Location Zone
 538 Wingtip, Left
 638 Wingtip, Right

 (2)  
Access Panel 538B Access Door - Navigation Light Fairing, Left 638B Access Door - Navigation Light Fairing, Right

 D. Procedure
 S 144-010
 (1)  
Clean the drain/vent hole, if it is necessary.

 (2)  
If the hole has a cover, remove it.

 S 424-012

 (3)  
Install the fairing.

 S 434-011
 (a)  Put the fairing on the wing.
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747-400 MAINTENANCE MANUAL
 (b)  Install the fasteners at all locations.
 (4)  S 434-013Connect the electrical connectors to the strobe and the navigation lights.
 (5)  S 414-014Close and lock the access panel 538B or 638B.
 (6)  S 864-015Close the 6L32 EXTERIOR LIGHT BEACON STROBE circuit breaker on panel P6.
 (7)  S 864-016For the left wing, close the 6L28 EXTERIOR LIGHT L WING CONT circuit breaker on the main power circuit breaker of panel P6.
　
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