(g)  
Turn the screw in the sealant bleed port until only one more turn will remove it.

 (h)  
Remove the pressure bolt.

 (i)  
Drain all collected fuel.

 (j)  
Install the pressure bolts (approximately 12 turns or 1/2 inch

 (12.7 MM).
 (k)  
Put BMS 5-26 Type II Class A-2 sealant, in the sealant bleed port, Step 3, (Fig. 809).

 (l)  
Install the screw in the sealant loading port.

 (m)  
Tighten the screw in the sealant bleed port.

 (n)  
Tighten the pressure bolt to 5 pound-inches (.564 newton-meters) and hold for 5 minutes.

 (o)  
Hit the sides of the adapter lightly with a small hammer or mallet, Step 4, (Fig. 809), to remove the adapter.

 (p)  
Examine the repair for fuel leaks.

 (q)  
If the fuel leak continues, do the procedure again.

 (r)  
If you must replace the self-sealing rivet, refer to the structural repair manual.

 (s)  
Clean the sealant from the wing surface and the adapter with Series 93 solvent (AMM 20-30-93/201).

 (t)  
Do not try to clean the adhesive from the wing surface.

 NOTE: The adhesive wears off in 1 to 2 weeks.
____
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 S 398-253
 (3)  
Apply sealant to a self-sealing rivet with a temporary repair tool (Fig. 810).

 (a)  
Remove paint from around the rivet that leaks with an approved emery cloth.

 WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON
_______ YOUR SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATQ SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
 (b)  Clean the temporary repair tool and the wing surface with Series 93 solvent (AMM 20-30-93/201).
 NOTE: Do not touch the wing surface with your fingers after
____
 you clean it.

 (c)  
Make a mark on the wing surface to show the position of the temporary repair tool while it is in use (Fig. 810).

 (d)  
Fill the temporary repair tool, F70230-1, with mixed sealant, BMS 5-26, Type II Class A-2 sealant.

 (e)  
Put the temporary repair tool into a small rivet gun.

 (f)  
Put the O-ring of the temporary repair tool on the wing surface at the marked location.

 CAUTION: ALWAYS KEEP THE TEMPORARY REPAIR TOOL PERPENDICULAR TO THE
_______ WING SURFACE. IF YOU DO NOT KEEP THE TEMPORARY REPAIR TOOL PERPENDICULAR TO THE WING SURFACE, DAMAGE TO THE WING SURFACE COULD OCCUR.
 (g)  
Operate the rivet gun until sealant is applied around the rivet that leaks.

 (h)  
Examine the repair for fuel leaks.

 (i)  
If the fuel leak continues, do the procedure again.

 (j)  
If you must replace the self-sealing rivet, refer to the structural repair manual.

 (k)  
Clean the sealant from the temporary repair tool and the wing surface with MEK.

 NOTE: Make sure you do not touch the area with the new
____
 sealant.

 S 398-254
 (4)  
Do these steps to install a click patch:

 (a)  
Do this task: Analysis of the Fuel Leak Type
 (AMM 28-11-00/601).

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747-400 MAINTENANCE MANUAL
 (b)  Make sure the leak type is not more than a heavy seep.
 NOTE: If the leak is not more than a heavy seep, then you can
____ use the Click Patch kit to repair the fuel leak.
 (c)  
　
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