106 parts by weight: Component AB 100 parts by weight: Component CD
NOTE: Adhesive should be used as soon after mixing as possible. Pot life of adhesive is approximately 25 minutes in large volume or 2 hours when spread out.
(c) Apply adhesive by either of the following methods:
1) Roller Coat Application
a) Apply adhesive to surface of honeycomb core using three or four roller coats in criss-crossing directions. Apply adhesive to entire core area until a coating of 8 to 12 grams per square foot is obtained. Eliminate all void areas but do not build up excessive amounts of adhesive.
2) Spread Application a) Obtain a 0.30-inch thick serrated metal spreader with twenty 60-degree teeth per inch.
b) Apply a uniform adhesive coating of 12 ±2 grams per square foot to faying surface of decorative sheet. Eliminate all void areas but do not build up excessive amounts of adhesive.
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(d)
Place decorative sheet against honeycomb core.
NOTE: Once decorative sheet is brought down on honeycomb core it must not be moved as this can result in displacing adhesive buildup.
(e)
Wipe excess adhesive and all foreign particles from decorative surface of panel with a clean gauze pad satured in naphtha. Wipe with new clean gauze before solvent drys.
(f) Apply uniform pressure of 5 to 10 psi to panel and allow adhesive to cure. AD. Repair Method No. 28
(1)
General
(a) This method is for the repair of gaps at butt joints in vinyl decorative material.
(2)
Equipment and Materials
(a)
Quart can with sealtight lid.
(b)
Mechanical agitator
(c)
Cyclohexanone
(d)
Tetrahydrofuran
(e)
Translucent semirigid vinyl sheet
(3)
Prepare Touch-Up solution
(a)
Pour equal weights of cyclohexanone and tetrahydrofuran into a quart can (with a sealtight lid).
(b)
Cut translucent semirigid vinyl sheet into quantity of small pieces.
(c)
Place small pieces of vinyl in can with cyclohexane and tetrahydrofuran and put on mechanical agitator (paint shaker).
(d)
Agitate until all vinyl has dissolved. Add more vinyl or solvent as necessary to obtain desired viscosity.
(e)
Add pearlescent powder and silk screen vinyl inks to match desired color and pearlescence.
(4)
Repair Short Butt Joints
(a) Apply touchup solution to gaps in butt joint with an artist’s brush.
NOTE: Quality of repair will depend on skill of repairman.
(5) Repair Long Butt Joints
(a)
Place masking tape on both sides of butt joint.
(b)
Apply touchup solution along butt joint to form a bead approximately 1/16 inch high.
(c)
Remove masking tape.
(d)
When touchup solution has set but still can be dented with fingernail, cut off bead flush with decorative surface using a razor blade.
(e)
If touchup solution shrinks after drying, repeat steps (a) thru (d) as required.
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
AE. Repair Method No. 29
(1)
General
(a) This method is for the repair of polysulfane and polycarbonate plastics.
(2)
Equipment and Materials
(a)
Orvus WA paste
(b)
Clean, dry cheesecloth
(c)
No. 400 sandpaper
(d)
Aliphatic naptha
(e)
Hysol TE1005 resin; Hysol HD3561 Hardener
(f)
BMS 10-55 water based paint
(g)
181 glass fabric
(3)
Repair of Scraped or Marred Areas
(a)
Clean surface with mild soap (Orvus WA Paste) and water. Rinse with clean water and wipe dry with clean cloth.
(b)
Sand area to be repaired using No. 400 (or finer) sandpaper.
(c)
Reclean with cold water to remove sandpaper grit and wipe dry with cheesecloth.
(4)
Repair of Deep Gouges
CAUTION: IF THERE IS A DENT AROUND THE GOUGE, CUT OUT ENTIRE DENTED AREA AND REPAIR AS A CRACK.
(a)
Clean surface with gauze sponge moistened with aliphatic naptha. Dry with clean dry gauze. Do not allow naptha to evaporate dry on the surface.
(b)
Sand area to be repaired using No. 400 ( or finer ) sandpaper.
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