2) An aluminum backing plate, approximately . to . inch larger than diameter of the hole, shall be bonded over hole on non-decorative (aluminum) side of panel, using Eastman 910 adhesive.
3) Eastman 910 adhesive shall be applied as follows: a) Aluminum faying surfaces shall be cleaned with ethyl alcohol. b) wipe dry. c) Apply a thin coat of Eastman 910 adhesive to faying surfaces.
NOTE: Do not apply an excessive amount of adhesive as an excess will inhibit cure.
d) Aluminum backing plate shall then be pressed firmly in place on back of panel, using maximum hand pressure until a bond is assured (approximately 60 seconds).
4) A disk of aluminum same diameter as hole and same thickness as aluminum of the panel shall be bonded in the hole, using procedures given in par. (c) 2.
NOTE: This disk must be flush with aluminum of panel and free of burrs and other imperfections.
5) complete this repair in accordance with Method No. 12.
P. Repair Method No. 14
(1)
General
(a) This method is used to repair holes that partially or completely penetrate vinyl (cloth-backed or semi-rigid) honeycomb ( aluminum or paper ) or plywood panels.
(2)
Equipment and Materials
(a)
Epibond 126
(b)
Hardener, HN 9812
(c)
Calcium Carbonate
(d)
Masking Tape (Permacel No. 718)
(3)
Repair: (Holes in vinyl-Honeycomb or Plywood)
(a)
Area adjacent to damaged area shall be masked off (Permacel No. 718 tape) in order to protect face of panel from damage due to filling with potting compound and sanding.
(b)
Thoroughly mix the following materials as follows:
100 parts by weight - Epibond 126 65 parts by weight - HN 9812 Hardener 15 parts by weight - Calcium Carbonate
(c)
Hole in panel shall be filled flush with fiberglass skin or plywood beneath decorative sheet material using above compound.
NOTE: It may be necessary to sand potting compound in order for it to be flush with aluminum or fiberglass skin or plywood. This may be accomplished, using a microshaver or equivalent equipment.
(d)
Remove masking tape.
(e)
Complete repair in accordance with Method No. 6, (patching).
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25-00-11 Page 226 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 15/76
Q. Repair Method No. 15
(1)
General
(a) This method describes the procedures used to rebond PVC extrusions and molded parts (BMS 6-8-9) and PVC plastisols, cast and molded (BMS 8-44).
(2)
Equipment and Materials
(a)
Adhesive, Eastman 910
(b)
Spatula
(3)
Repair: (Rebonding of PVC Plastisol Parts)
(a)
After part has been cleaned, a thin film of Eastman 910 adhesive shall be applied with a small spatula to one or other of faying surfaces - approximately two (2) square inches at a time.
NOTE: Do not apply an excessive amount of adhesive as an excess will inhibit cure. Eastman 910 adhesive shall be kept in a closed container when not in use and preferably in a cool place when not in use.
(b)
Surfaces to be bonded shall be pressed firmly together with maximum hand pressure and held until adhesive sets (approximately 60 seconds).
(c)
Continue rebonding operation progressively.
R. Repair Method No. 16
(1)
General
(a) This method is used to repair slight surface abrasions in stainless steel.
(2)
Equipment and Materials
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