500 Sealant Removal and Fairing Tools
Feb 20/92 Figure 801 (Sheet 2) 28-11-0
Page 804A
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Sealant Removal and Fairing Tools 500
28-11-0 Figure 801 (Sheet 3) Feb 20/92
Page 804B
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(18)
Sealant PR 1826, Class B-1/2 or B-1/4, dark gray, available in 6-ounce semkits with primer
(19)
Sealant PR 1828, Class B-1/2 or B-1/4, white, available in 6-ounce semkits
(20)
Proseal 860, Class B-1/6, Products Research Co.
(21)
Cement and Catalyst - Eastman 910 (Ref 20-30-11)
(22)
Balance scale with set of graduated weights accurate to + 0.4 ounce or + 10 grams - For weight measurements of sealant and curing agent
(23)
Click Patch Kit - Semco, 5454 San Fernando Rd., Glendale, CA 91203
(24)
Click Patch Adhesive - BAC 5010 Type 44 or Type 71 quick cure
(25)
Volume measuring containers - with graduations for volume measurement of sealant and finish material and curing agents
(26)
Spatulas - Assorted for mixing small batches of sealant and finish material and for application of sealant
(27)
Shaker - Red Devil multidirectional
(28)
Cans with lids - For temporary storage of mixed sealant and finish material
(29)
Refrigerator/freezer - For extending usability range of mixed sealant or finish material (if desired)
(30)
Alodine Application Requirements:
(a)
Alodine 600 Powder - MIL-C-5541 (SRM 51-10-2)
(b)
Distilled water - 1-gallon containers
(c)
Stainless steel container
(d)
Brush, swab, sprayer, blotting paper or cellulose sponge for application
(31)
Corrosion Resistant Finish for Integral Fuel Tanks
(a) BMS 10-20, Type II (preferred) (Ref 20-30-41)
NOTE: BMS 10-20, Type II is mutually compatible with BMS 5-26 Type II and Proseal 860 sealants.
1) 454-4-1, Bostik-Finch, Inc.
(b) MIL-C-27725 (Ref 20-30-41)
CAUTION: USE MIL-C-27725 FINISH MATERIAL ONLY AS TOP COATING.
1) 823-011 or 823-730, DeSoto Chemical Coatings, Inc. 2) PR-1560M, PR-1560MC, PR-1560MK, Products Research Co.
(32)
Spray Equipment - DeVilbiss Model MBC or JGA, The DeVilbiss Co., 300 Phillips Ave., Toledo, Ohio (recommended for large area application of corrosion resistant finish)
(33)
Labels - For identifying mixed batches of sealant or finish material placed in item (23) cans
C. Prepare for Fuel Tank Repair
(1)
Defuel and purge applicable tank (Ref 28-23-0, 28-10-0 MP).
(2)
Using sealant cutting tools (Fig. 801), remove faulty sealant.
(a)
Cut faulty section from fillet (Fig. 803). Slope cuts at ends of section for new sealant to lap remaining portions of old fillet. Avoid abrupt changes in cross section.
(b)
If fillet adhesion is good, it is not necessary to cut sealant down to bare metal. Assure all loose cuts or flaps are removed.
(c)
If faulty sealant involves fillet sealed fasteners, cut around fastener base using sealant cutting tool (Fig. 801) and separate sealant from fastener head by pulling sealant with pliers. Cut away any remaining sealant.
NOTE: Small quantities of sealant which adhere firmly to fastener need not be removed.
(d)
If leak involves faulty injection seal, remove sealant from short injection channel with a hooked wire and small cutting tools. Clear injection channel all the way through since trapped air will prevent complete filling of channel with new sealant. Exercise care not to damage structure.
WARNING: OBSERVE ALL PRECAUTIONS FOR PURGING AND FUEL TANK ENTRY.
502
Aug 01/94 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 28-11-0 Page 805
Fillet Seal Removal 502
28-11-0Page 806 Figure 803 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Nov 15/77
NOTE: Longer injection channels require structure disassembly (Ref Structural Repair Manual). Faulty injection seal may be repaired by raising seal plane to isolate faulty seal from fuel.
(3)
For faulty prepack or faying surface sealant, disassemble structure surrounding faulty sealant (Ref Structural Repair Manual) and remove sealant with cutting tools and plastic scrapers.
NOTE: If it is not desired to disassemble structure, leak may be repaired by raising seal plane to isolate faulty sealant from fuel if affected area is not too large. 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 燃油 FUEL(53)
