J. Repair Method No. 8
(1)
General
(a) This method is used to repair holes (Type II damage in leather).
(2)
Equipment and Materials
(a)
Suitable Adhesive
(b)
Traffic wax - heavy duty
(c)
Mylar film
(d)
Lubricant - light machine oil
(3)
Repair: (Leather)
(a)
Thoroughly mix the adhesive according to manufacturers specifications.
(b)
Apply heavy duty traffic wax with cotton tipped swab to area surrounding damage.
(c)
Sufficient resin shall be applied to fill damaged area.
(d)
Embossed mylar film shall then be placed over resin. Unmarked side of mylar film shall be against resin.
(e)
Upper surface of mylar film shall be lubricated with light oil.
(f)
Working from center of repair, resin shall be swept and faired to contour desired, using flexible or rigid squeegee.
NOTE: It is important that as much as possible of excess resin be swept out from under mylar film.
(g)
Allow adhesive time to fully cure.
(h)
Mylar film shall be carefully stripped from cured resin.
K. Repair Method No. 9
(1)
General
(a) This method describes the procedures required for the rework of voids in foam material.
(2)
Equipment and Materials
(a)
Stabond Adhesive T-100
(b)
Cork Bore
(c)
Foam Material
(3)
Repair: (Foam)
(a)
All voids 1/2 inch in diameter or larger shall be reworked as follows: When a void is located, its size shall be determined. A cylindrical plug of foam shall then be cut out of void area equal to or not more than 1/2 inch larger than void, using a cork bore or other suitable tool.
(b)
Same tool that was used to core out void shall also be used to cut a plug of foam for bonding into void area. Foam plug shall be of same density and compression deflection as foam that is in part.
(c)
Foam plug shall be bonded into void area, using Stabond Adhesive T-100.
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(d) Adhesive shall be applied as follows: 1) Apply one medium brush coat of adhesive to each of faying surfaces. 2) Allow adhesive to dry until tacky but will not transfer to knuckle when lightly
touched. 3) Press faying surfaces together with maximum hand pressure. 4) Assemblies may be handled immediately, but do not stress bond for 24 hours.
L. Repair Method No. 10
(1)
General
(a) This method describes procedures required for rework of voids in material of the Hatrack Bull nose.
(2)
Equipment and Material
(a)
Pro-Seal - BMS 8-40
(b)
Resin - PR-1201Q
(c)
Catalyst - PR-1201A
(d)
Pro-Seal Resin - #727
(e)
Pro-Seal Paste - #727-A
(f)
Cork bore
(g)
Mylar film
(h)
Machine lubricating oil
(i)
Masking Tape - #718
(j)
Squeegee
(k)
PE-102 Component I (R)
(l)
PE-102 Component II (C)
(m)
Gun, Semco Sealant No. 250
(n)
Polyethylene Nozzle, #420
(o)
Cartridge, 6 ounce, Polyethylene
(3)
Repair foam in Hatrack Bullnose Prior to Bonding Nose Former in Place.
NOTE: Three methods are available for this repair. Method No. 9 may be used, or repair may be made with BMS 8-40 or Stafoam PE-102 as described in the following paragraphs.
(a) Repair with BMS 8-40. 1) Work table shall be covered with clean wrapping paper to protect boltaron cover material from soiling. 2) A cylindrical foam plug shall be cut out of void area equal to or not more than 1/2 inch larger than void, using cork bore or other suitable tool. 3) Kits of BMS 8-40 are coded either as PRC or Pro-Seal. If PRC is designated, mix following materials as follows: 100 grams PR-1201Q Resin 10 grams PR-1201A Catalyst If Pro-Seal is designated, mix following materials as follows:
100 grams Pro-Seal #727 Resin 12 grams Pro-Seal #727-A Paste
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Accelerator paste shall be thoroughly mixed to smooth creamy consistency. Base resin shall be stirred until material is smooth and homogenous. Catalyst shall be added to resin and mixed until no catalyst streaks or traces of unmixed compound are visible. Compound can be checked for complete mixing by spreading a drop very thinly over a piece of white paper and checking for streaks or specks. Once mixed, material slowly increases in viscosity and eventually becomes a firm rubbery mass. Pot life is approximately one hour at 75°F. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737 AMM 飞机维护手册 EQUIPMENT/FURNISHINGS(16)
