(b)  
Dry the surfaces with clean cheesecloth before the methyl ethyl ketone dries.

 (c)  
Do the two steps above as necessary to fully remove dirt, oil, paint and other soils.

 NOTE: Clean surfaces are necessary for a good bond.
____
 (d)  
Lightly rub the repair area with 180 grit (or finer) abrasive paper to make the surface rough.

 (e)  
Remove the dust particles with dry cheesecloth.

 (f)  
For a repair with RTV 732 or Silastic 731 RTV or General Electric SR-529 adhesive, apply a light layer of Dow Corning 1200 RTV or S2260 primer on all the surfaces except silicone rubber and let air dry for 30 minutes before you apply the adhesive.

 NOTE: Primer is not necessary on silicone rubber.
____
 (g) Do these steps to do a repair with Dow-Corning 93-076:
 1)  On any surfaces that are not silicone rubber, apply a light layer of Dow Corning 1204 primer and let it dry for 1-24 hours before you apply the adhesive.
 2)  On silicone rubber surfaces, apply a light layer of primer (A 1:1 mixture of Thermolite 12 and MEK is satisfactory) and let it dry from 10 minutes to no more than 24 hours before you apply the adhesive.
 (h)  To do a repair with RTV 700:
 1)  On any surface that is not silicone rubber, apply a light layer of SS4155 primer and let it dry for at least 60 minutes before you apply the adhesive.
 2)  When you use RTV 700, it is not necessary to use primer on silicone rubber surfaces.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

D-D E-E Seal Repairs (Example) Figure 802
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 348-005-B00
 (2)  
Repair the joints in the seal.

 (a)  
When the damaged area is minor (1/2 square inch maximum), repair the seal as follows: 1) Use Procedure A with Type I adhesive to bond the

 delaminated seal.

 (b)  
When the damaged area is only in the edge of the splice (the seal does not leak) repair the seal as follows: 1) Cut off the damaged flap with a sharp knife. 2) Apply a thin layer of Type II or Type III adhesive.

 S 348-006-B00
 (3)  
Repair damaged areas which can leak (if you make the damaged area larger).

 (a)  
When the damaged area is on the edge of the seal, repair the seal as follows: 1) Use Procedure A or Procedure B with Type II adhesive to

 bond the damaged seal.
 S 348-007-B00
 (4)  
Repair holes or damage in the rubber in the area of the joint.

 (a)  
Use Procedure B with Type II or Type III adhesive to bond the damaged seal.

 S 348-008-B00
 (5)  
Repair holes or damage in the blade section of the seal.

 (a)  
Repair small holes or damage (0.2 inch maximum length).

 1)  Use Procedure A with Type I, Type II, or Type III adhesive to bond the damaged seal.

 (b)  
Repair large damaged areas (1.0 inch maximum length). 1) Pull the seal blade to open the damaged area. 2) Carefully drill a hole in the end of the damaged area.

 NOTE: You can use a sharpened metal tube as a drill bit to
____
 cut the hole.

 3) Smooth out the hole and miter the edges. 4) Use Procedure A with Type II or Type III adhesive to bond the damaged seal.
 (c)  Repair large holes (2.0 inches maximum length)(Fig. 802). 1) Pull the seal blade to open the hole. 2) Carefully drill a hole in the end of the cut.
 NOTE: You can use a sharpened metal tube as a drill bit to
____
 cut the hole.

 3) Smooth out the hole and miter the edges. 4) Cut a piece of Dacron fabric to overlap the sides and the ends of the hole by 0.5 inch.
　
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