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A

747-400
MAINTENANCE MANUAL

INBD

(4 LOCATIONS)
FWD
LAMP HOLDER

STROBE LIGHT
Wingtip Strobe Light Installation
Figure 201

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747-400 MAINTENANCE MANUAL
 (c)  
Pull out the lamp holder.

 (d)  
Carefully pull the lamp from the lamp retainer.

 S 422-011
 (3)  Do these steps to install the replacement lamp:
 (a)  
If it is necessary, clean the electrical contacts in the lamp receptacles to remove all dirt and corrosion.

 (b)  
Clean the lens with a clean dry cloth.

 CAUTION:_______DO NOT LET YOUR FINGERS TOUCH THE REPLACEMENT LAMP. THE OILS FROM YOUR SKIN CAN CAUSE THE LAMP TO BREAK WHEN IT IS HOT.

 (c)  
Push the replacement lamp into the lamp retainer in the light assembly.

 (d)  
Carefully push the lamp holder against the light assembly.

 NOTE: Make sure the end of the lamp goes into the lamp
____
 retainer.

 (e)  Install the side plate with its mounting screws.
 S 412-012
 (4)  
Install the light assembly (Ref 33-44-05/401).

 S 712-013

 (5)  
Do a test of the replacement lamp:

 (a)  Supply electrical power (Ref 24-22-00/201).
 WARNING: DO NOT LET THE STROBE LIGHT FLASH DIRECTLY IN YOUR EYES.
_______ THE INTENSITY OF THE STROBE LIGHT CAN CAUSE DAMAGE TO YOUR EYES.
 (b)  
Put the STROBE switch on the P5 panel to ON.

 (c)  
Make sure the strobe light is on.

 (d)  
Put the STROBE switch on the P5 panel to OFF.

 (e)  
Make sure the strobe light is off.

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

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747-400 MAINTENANCE MANUAL
 WINGTIP STROBE LIGHT - REMOVAL/INSTALLATION
___________________________________________
 1.  General
_______
 A.  This procedure contains these tasks:
 (1)
A task for the removal of the strobe light.

 (2)
A task for the installation of the strobe light.

 TASK 33-44-05-004-001
 2.  Strobe Light Removal (Fig. 401)
____________________
 A.  References
 (1)
24-22-00/201, Manual Control

 (2)
SSM 33-44-02

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

 C.  Procedure
 S 024-020
 (1) Do these steps to remove the strobe light:
 WARNING: DO NOT TOUCH THE LIGHT ASSEMBLY FOR 10 MINUTES AFTER YOU
_______ REMOVE POWER. AN ELECTRICAL SHOCK FROM THE HIGH VOLTAGE IN THE LIGHT CAN CAUSE INJURY TO PERSONS.
 (a)
Open this circuit breaker and attach a DO-NOT-CLOSE tag.

 1)  P6 Main Power Distribution Panel a) 6L32 STROBE

 (b)
Open the access panel (1) below the light on the wingtip.

 (c)
Disconnect the electrical connector (3).

 (d)
Remove the mounting bolts (2).

 (e)
Remove the light assembly (4).

 TASK 33-44-05-404-006
 3.  Installation (Wingtip Strobe Light) (Fig. 401)
___________________________________
 A.  Consumable Materials
 (1) G01043 Cloth - nonabrasive, lint free
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