5) Allow resin to cure at temperatures of 70-140oF.
6) Sand repaired area until surface is smooth and flush with decorative surface. Final sanding shall be done with 400 to 600 grit paper. To match gloss, polish with a cotton polishing wheel and Learock S-30 or 888 buffing compound.
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Oct 20/86 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 25-00-11 Page 229
V. Repair Method No. 20
(1)
General
(a) This method is used to repair cuts and scratches and other surface damage in the decorative surface of Tedlar-vinyl laminates
(2)
Equipment and Materials
(a)
Sandpaper (400 to 600 grit)
(b)
Duracote S-25 (top finish)
(c)
Air brush
(d)
Duracote 027.5 (dulling agent)
(e)
Hi-speed lacquer
(f)
Polyurethane Paint - BMS 10-83, Type II
(g)
Primer - BMS 10-82, Type I
(h)
Methyl Ethyl Ketone (MEK) - TT-M261
(3)
Repair: (Vinyl Paste and Clear Coat)
(a)
Repair vinyl per Method 2.
(b)
Sand repaired area until surface is smooth. Final sanding shall be done with 400 or 600 grit paper.
(c)
Thoroughly wipe surface using cheesecloth wet with MEK.
CAUTION: DO NOT ALLOW SOLVENT TO REMAIN IN CONTACT WITH PLASTICS FOR PROLONGED PERIODS. DAMAGE TO SURFACE CAN RESULT.
(d)
Dry surface with clean dry wiper before MEK evaporates.
(e)
Mask area surrounding surface to be painted.
(f)
Prime area to be painted with BMS type 1 primer.
(g)
Select polyurethane paint which matches color of surrounding surface and thin as required.
(h)
Apply several cross coats of paint to achieve color match with surrounding area as base coat.
(i)
Remove masking and allow base coat to cure for 2 hours at 70 to 800F before handling or 1 hour before applying a texture coat.
(j)
If desired, a texture coat of same paint without thinning may be applied to match existing interior. Allow to dry 3 hours before handling.
(k)
To match decorative color patterns, apply silkscreen vinyl ink of required color, using an artist’s brush.
(l)
If required to match surrounding area, coat repaired area with Duracote S-25 top finish or Sherwin-Williams Hi-Speed lacquer. Apply 4 or 5 passes by spraying with an Air-Brush; allow drying time between passes. Gloss can be altered by adding Duracote 027.5 dulling agent (15% by weight) to S-25 top finish. Sherwin-Williams Hi-Speed lacquer can be obtained in various degrees of gloss. S-25 may be thinned with a 50-50 mixture (by volume) of tetrahydrofuran and cyclohexanone for spraying.
WARNING: PAINTS, PRIMERS, LACQUERS AND VARNISHES MUST BE HANDLED CAREFULLY AND USED ONLY IN WELL VENTILATED APPROVED AREAS. AVOID PROLONGED BREATHING OF VAPORS. AVOID EYE AND REPEATED SKIN CONTACT. KEEP AWAY FROM SPARKS AND FLAMES. RESPIRATOR USE IS REQUIRED UNLESS WAIVED BY THE BIOENVIRONMENTAL ENGINEER.
25-00-11 Oct 20/86
Page 230
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
W. Repair Method No. 21
(1)
General
(a) This method is used for the repair of damage that penetrates decorative paper base laminates (Formica) and Tedlar-Conolite laminates. This is a sweep fairing repair method.
(2)
Equipment and Materials
(a)
Fiber Resin - No. 5-418S or 5-419S
(b)
Hardener - Fiber Resin No. 5-40A
(c)
Embossed mylar
(d)
Teflon squeegee
(e)
Mosite 1440 (Silicone Rubber)
(f)
Sandpaper (600 grit)
(g)
Epoxy Enamel - BMS 10-11, Type 2
(h)
Aluminum (0.060 inches thick)
(i)
Color matching kit (Fiberlay Inc.)
(j)
Decorative material
(k)
Wax parting agent
(3)
Repair: (Epoxy Sweep Fairing - Colored)
CAUTION: COLOR MATCHING WITH THESE MATERIALS IS VERY DIFFICULT AND A REPAIR WITH AN UNSATISFACTORY COLOR MATCH MAY RESULT.
NOTE: This repair shall not be used on defects greater than 3/4 inch in the maximum dimension. Minimum spacing between repairs shall be 1 inch. Materials used in this repair are Skydrol-resistant when fully cured.
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