S 712-032
 (4)  Do a test of the navigation light:
 (a)  
Supply electrical power (Ref 24-22-00/201).

 (b)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 1)  P6 Main Power Distribution Panel a) 6L29 NAV LTS WING-R b) 6L28 NAV LTS WING-L

 (c)  
Put the NAV switch on the P5 panel to ON.

 (d)  
Make sure that the wingtip navigation lights are on.

 (e)  
Put the NAV switch on the P5 panel to OFF.

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 (f)  
Make sure the wingtip navigation lights are off.

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

 F. Put the airplane back to its usual condition
 S 862-034
 (1)  Remove the DO-NOT-OPERATE tag from the STROBE switch on the P5 panel.
 TASK 33-43-04-962-039
 4. Wingtip Light Lens Replacement (Fig. 201)
______________________________
 A. References
 (1)  
AMM 51-31-01/201, Seals And Sealing

 (2)  
AMM 57-23-01/801, Wingtip Forward Faring

 (3)  
BAC 5750, Solvent Cleaning

 (4)  
IPC 57-23-01-10, Tip Fairing Installation - Wing Extension Navigation Light Forward

 B. Consumable Materials
 (1)  BMS 5-26 Class B-1/2 (alternative)
 BMS 5-79 Class B-2 (alternative)

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

 D. Procedure
 S 862-040
 (1)  Do these steps to prepare for the replacement of the wingtip light lens [11]:
 (a)  Open the applicable circuit breakers and attach DO-NOT-CLOSE tags: 1) P6 Main Power Distribution Panel
 a) 6L28 NAV LTS WING-L b) 6L29 NAV LTS WING-R
 WARNING: MAKE SURE THE STROBE LIGHTS ARE OFF WHEN YOU DO
_______ MAINTENANCE ON THE WINGTIP LIGHT LENS [11]. THE OPERATION OF THE STROBE LIGHT CAN CAUSE DAMAGE TO YOUR EYES.
 (b)  On the overhead panel P5, make sure that the STROBE switch is in the OFF position.
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 (c)  Attach a DO-NOT-OPERATE tag on the STROBE switch.
 S 962-041
 (2)  Do these steps to replace the wingtip light lens [11]:
 (a)  
Remove the bolts that hold the lens [11] to the airplane (IPC 57-23-01-10).

 (b)  
Remove the lens [11] from the airplane.

 (c)  
For a temporary repair of the wingtip light lens,
 (AMM 57-23-01/801)

 NOTE: This task is optional if a new lens is not available.
____
 (d)  
Clean the outside of the replacement lens [11] around the edges with solvent (BAC 5750).

 (e)  
Clean the surfaces the replacement lens [11] touches with solvent (BAC 5750).

 (f)  
Install the replacement lens [11] on the airplane
 (IPC 57-23-01-10).

 (g)  
Seal the outside edges of the lens [11] and the airplane with BMS 5-26 Class B-1/2 sealant (alternative) or BMS 5-79 Class B-2 sealant (alternative) (AMM 51-31-01/201).

 S 862-042
 (3)  Remove the DO-NOT-CLOSE tags and close the applicable circuit breakers:
 (a)  P6 Main Power Distribution Panel
 1) 6L28 NAV LTS WING-L
 2) 6L29 NAV LTS WING-R

 S 862-043
 (4)  On the overhead panel P5, remove the DO-NOT-OPERATE tag from the STROBE switch.
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