TO 1-1-700 - Robins Air Force Base

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TO 1-1-700 Figure 12-12. Typical Methods of Sealing Fasteners NOTE As fasteners are installed, the sealant material pushed into the fastener holes will help seal against moisture intrusion. f. Install access panel. MIL-PRF-16173, COMPOUND, CORROSION PREVEN- TIVE 37 MIL-PRF-63460, LUBRICANT, CLEANER AND PRESER- VATIVE 44 NOTE No curing time is required. All fasteners should be wet installed with MIL-PRF-16173, Grade 4 Corrosion Preventive Compound (CPC); MIL-PRF-63460 CPC; or CPC material specified in the specific equipment system specific maintenance manual. 12.7.7 External Structure. If, during normal maintenance, it becomes necessary to remove and replace components (planks, skin, fasteners, fittings, etc.), they shall be sealed when reinstalled, even if they were not sealed originally. The only exception to this requirement is a temporary repair. See Figure 12-13, Figure 12-14 and Figure 12-15 for typical sealing methods. 12.7.8 Depressions. When the thickness of metal is reduced by more than 15 mils (0.015 inch) in the removal of corrosion damage, fill the depression with MIL-PRF-81733, Type II, Class 1 or 2, Grade A sealant after applying a chemical conversion treatment per Chapter 7. NOTE The above procedure does not apply to the use of SAE AMS 3255 EPTFE and Av-DEC® HT3935-7 or HT3000 sealing tapes; or to the use of SAE AMS-S- 8802 (MIL-S-8802) sealant. 12-34
TO 1-1-700 12.7.9 Damaged Sealant. Many areas on equipment are sealed either at the factory or by depots during rework. Fresh sealant shall be applied whenever the previously applied sealant is damaged. Remove the damaged sealant with a plastic scraper and, if necessary, prepare the metal surface in accordance with Chapters 8 and 11 of this manual. Slightly roughen a strip of the undamaged sealant approximately one inch wide around the boundary of the stripped area with an A-A-58054, Type I, Grade C Abrasive Mat and then clean the area per paragraph 12-6.1. Apply the new sealant by brush, sealant gun, or spatula and then smooth out the surface with a spatula as required. The new sealant should overlap onto the roughened area of the old sealant. between patches (or doublers) and skins shall receive a surface treatment per Section II of Chapter 5 in TO 1-1-691 before the repair parts are installed. Coat the faying surfaces with MIL- PRF-81733, Type IV, Class 1 or 2, Grade A sealant prior to installation of patch. Install all fasteners wet. MIL-A-46146, ADHESIVE/SEALANT, SILICONE RTV, NON-CORROSIVE, GROUP I/II/III, Type I OR GROUP I, Type II 19 NOTE • To assist with removal of damaged sealant, a liquid product known as Sky Restore® distributed by AeroSafe Products Inc. (see TO 1-1-691) may be applied to the damaged area with a non-metallic bristle brush, an SAE AMS 3819A, Class 2, Grade A or equivalent cleaning cloth, or a pump spray bottle and allowed to dwell for 15 to 50 minutes until the sealant is softened. A plastic scrapper may then be used to remove the damaged sealant. This material has a fairly obnoxious odor so it must be used either in a well ventilated area or personnel must wear an appropriate respirator in all confined areas. • After the damaged sealant is scraped away, the area must be neutralized and cleaned with a liquid product known as Sky Wash® distributed by Aero- Safe Products Inc. (see Appendix A in TO 1-1- 691) applied in the same manner as above, scrubbed with the same type of brush or cloth as used above, and wiped dry • Other tools useful for sealant removal are the 3M Co. SR Radial Bristle Discs and plastic SR Cutters mounted on a pneumatic drill motor and the Kell- Strom Toll Co. OZ7000 pneumatic sealant removal kit, a vibro gun with a set of plastic scrappers and OZ7006 manual sealant removal kit, a rubber palm support handle with a set of plastic scrappers. (see Appendix B in TO 1-1-691). MIL-PRF-81733, SEALING AND COATING COMPOUND, CORROSION INHIBITIVE 48 12.7.10 Extensive Repair. If corrosion damage is so extensive that structural repair is necessary, all faying surfaces SAE AMS-3276 (MIL-S-83430), SEALING COMPOUND, INTEGRAL FUEL TANK 59 SAE AMS 3374, SEALANT, SILICONE 75 12.7.11 High Temperature Areas. In areas where the temperature is expected to rise above +250 ºF (+121 ºC), a onepart silicone sealant, MIL-A-46146, Type I or III or SAE AMS 3374, Type 1, 2, 3, or 4 silicone sealant, should be used for temperatures up to +400 ºF (+204 ºC). SAE AMS 3276 (MIL- S-83430) sealant may be used in areas that experience intermittent temperatures up to +360 ºF (+182 ºC). Application of these sealants is by spatula or sealant (caulking) gun per paragraph 12.6.4. MIL-S-85420, SEALING COMPOUND, QUICK REPAIR, LOW TEMPERATURE CURING 53 SAE AMS-3277 (MIL-S-29574), SEALING COMPOUND, LOW TEMPERATURE CURING 61 12.7.12 Low Temperature Curing. When cold climates interfere with sealing operations by prolonging the sealant curing reaction, use MIL-S-85420 or SAE AMS 3277 (MIL-S- 29574). For better adhesion, an adhesion promoter can be used; refer to paragraph 12-3.3. SAE AMS 3255 EPTFE and Av-DEC HT3935-7 or HT3000 sealant tape gasket materials 12-35
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TO 1-1-700 TECHNICAL MANUAL CORROSI
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TO 1-1-700 TABLE OF CONTENTS Chapte
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TO 1-1-700 TABLE OF CONTENTS - CONT
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TO 1-1-700 LIST OF ILLUSTRATIONS -
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TO 1-1-700 FOREWORD 1. PURPOSE. The
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TO 1-1-700 List of Related Publicat
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TO 1-1-700 SAFETY SUMMARY 1. GENERA
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TO 1-1-700 AMS-G-6032, GREASE, PLUG
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TO 1-1-700 MIL-DTL-64159, COATING,
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TO 1-1-700 MIL-PRF-27617, GREASE, A
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TO 1-1-700 O-L-164, DRESSING, LEATH
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TO 1-1-700 MIL-T-81772, THINNER, PO
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TO 1-1-700 tronics equipment and th
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TO 1-1-700 cleaning situation, syst
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TO 1-1-700 c. Riveted joints shall
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TO 1-1-700 c. Remove and replace an
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TO 1-1-700 MIL-L-87177, LUBRICANT,
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TO 1-1-700 Figure 3-1. Simplified C
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TO 1-1-700 resistant, and also at t
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TO 1-1-700 is first noticeable as a
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TO 1-1-700 3.7.8 Oxygen Concentrati
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TO 1-1-700 Figure 3-14. Concentrati
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TO 1-1-700 Figure 3-17. Galvanic Se
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TO 1-1-700 Figure 3-20. Aluminum Su
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TO 1-1-700 3.8.7 CRES/Stainless Ste
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TO 1-1-700 3.9.10 Climate. Warm, mo
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TO 1-1-700 3.11 PREVENTATIVE MAINTE
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TO 1-1-700 CHAPTER 4 COMPOSITE AND
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TO 1-1-700 4.4.4.4 Glass parts shal
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TO 1-1-700 CHAPTER 5 PACKAGING (STO
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TO 1-1-700 extent of damage dependi
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TO 1-1-700 5.15 PRECAUTIONS FOR VCI
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TO 1-1-700 c. Secure the desiccant
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TO 1-1-700 Figure 5-8. Shock Isolat
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TO 1-1-700 Figure 5-9. Examples of
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TO 1-1-700 5.24.10 Rigid or Flexibl
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TO 1-1-700 CHAPTER 6 MOISTURE AND F
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TO 1-1-700 c. 6.2.6 Felt. Examine f
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TO 1-1-700 a. After first directing
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TO 1-1-700 6.4.5.14 Terminals, scre
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TO 1-1-700 NOTE • Authorized clea
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TO 1-1-700 Table 7-1. Cleaning of S
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TO 1-1-700 7.3.1.2.3 Portable, 45 g
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TO 1-1-700 Table 7-2. Common Milita
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TO 1-1-700 inactivity, storage, or
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TO 1-1-700 7.5.6.5.1 Grade 1 - A th
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TO 1-1-700 Table 7-4. Corrosion Pre
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TO 1-1-700 Table 7-5. Preservation
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TO 1-1-700 either case, MIL-PRF-269
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TO 1-1-700 MIL-PRF-85285, COATING,
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TO 1-1-700 c. Cadmium plated surfac
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TO 1-1-700 a. Scuff sand and feathe
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TO 1-1-700 7.7.7.2 If surface is no
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TO 1-1-700 7.7.9.2 Where only parti
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TO 1-1-700 7.8.1 Type I Application
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TO 1-1-700 Extend (Loctite) 32150 J
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TO 1-1-700 There are three ways to
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TO 1-1-700 vulnerable surfaces clea
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TO 1-1-700 Table 8-2. Materials, Th
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TO 1-1-700 Table 8-4. Electronic Cl
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TO 1-1-700 Table 8-5. Accessories o
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TO 1-1-700 Table 8-5. Accessories o
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TO 1-1-700 f. Devices with permanen
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TO 1-1-700 Table 8-7. Cleaning and
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TO 1-1-700 MIL-PRF-87937, CLEANING
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TO 1-1-700 of contamination). Maint
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TO 1-1-700 8.8.2 Protective Coating
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TO 1-1-700 • Tube clamps. • Min
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TO 1-1-700 a. For bonding/grounding
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TO 1-1-700 vertently destroy the mo
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TO 1-1-700 doors, and other corrosi
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TO 1-1-700 CHAPTER 10 CORROSION PRO
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TO 1-1-700 MIL-PRF-81733, SEALING A
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TO 1-1-700 d. After corrosion is re
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TO 1-1-700 (3) Stainless/CRES steel
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TO 1-1-700 10.9 WATER ENTRAPMENT AR
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TO 1-1-700 f. Shield equipment from
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TO 1-1-700 b. Use e-inch rivnuts of
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TO 1-1-700 10.17.3 If the plating s
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TO 1-1-700 Figure 10-16. Dissipatio
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TO 1-1-700 (2) If allowable damage
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TO 1-1-700 Table 11-1. Recommended
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Page 242 and 243: TO 1-1-700 MIL-PRF-81733, SEALING A
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TO 1-1-700 - Robins Air Force Base

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