TO 1-1-700 - Robins Air Force Base

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TO 1-1-700 d. Remove all uncured sealant residue by wiping the area with an SAE AMS 3819A, Class 2, Grade A or equivalent cleaning cloth wetted with a liquid product known as Sky Wash® distributed by AeroSafe Products Inc. and wiping dry with a clean, dry cloth of the same type. 12.6.6 Peel and Stick Application; AMS 3255 EPTFE Skyflex® and Av-DEC® HT3935-7 and HT3000 Sealing Tapes. Prior to application, prepare surface in accordance with paragraph 12.6.1. NOTE • MEK conforming to ASTM D740 may be used as an alternate solvent for cleaning up uncured sealant residues as long as it is not environmentally prohibited and the equipment SPM approves its use and requires it in system specific technical data. • See Appendixes A and B in TO 1-1-691 for procurement information on materials used for cleaning and masking. 12.6.5 Spray Gun Application. Prior to masking and sealing, prepare surface in accordance with paragraph 12.6.1. If any dirt or oil residues accumulate after conversion coating, clean thoroughly with solvent to ensure adequate adhesion of paint, primer, and sealant. a. Mask off adjacent areas with either MIL-PRF-121, Type I or II or MIL-PRF-131, Class 1 barrier material held in place with AMS T-21595, Type I masking tape to minimize overspray on adjacent areas. After surface treatment and any required primer application, do not contaminate areas to be sealed with soiled hands or tools as contamination prevents proper sealing tape adhesion. a. Examine faying surfaces to be sealed and build up any uneven areas on the equipment frame flange. Use Skyflex® part No. GUA-1003-1 compensation tape or a small piece of the same type of Skyflex® tape that will be used for AMS 3255 sealing tape applications and a small piece of the same type of Av-DEC tape that will be used for HT3935-7 and/or HT3000 sealing tape applications. This will create a level faying surface for panel sealing. b. Select the proper part No. sealant tape so that it will cover the full width of the faying surface to be sealed. Tape may be applied to either the equipment frame flange or to the panel faying surface. c. Measure and cut the required length of sealant tape. d. For corners, cut the ends of the tape at a 30 degree angle so that the sealant tape from the converging side will overlap by one-quarter to one-half inch. Do not fold the tape in corners as this will result in triple layer thickness. MIL-PRF-81733, SEALING AND COATING COMPOUND, CORROSION INHIBITIVE 48 b. Apply MIL-PRF-81733, Type III sprayable sealant in a solid, continuous pattern per the manufacturer's instructions and TO 1-1-8. NOTE The Dry Film Thickness (DFT) of spray sealant coatings shall be in the range of 3 to 5 mils (0.003 inch to 0.005 inch). Use care not to pull or stretch the sealant tape as it is applied. The stretched AMS 3255 EPTFE and Av- DEC® HT3000 tapes will retract even if clamped between faying surfaces, and the Av-Dec® HT3935- 7 tapes will be reduced in thickness. In either case, inadequate sealing may result. e. Peel the non-stick backing paper off the sealant tape a little at a time as the tape is applied to the equipment frame flange or mating panel surface. 12-28
TO 1-1-700 NOTE • Applying a small amount of extra pressure to the upper surface of the sealant tape will cause the pressure sensitive adhesive to adhere better to the faying surface on which it is being applied, and it will create indentations/discoloration at the fastener holes allowing for easier location/identification. If done with Av-DEC® 3935-7 sealant tapes, it must be done before the non-stick backing paper is removed. • If an AMS 3255 sealant tape without a pressure sensitive adhesive backing has been ordered for use in areas where fluid exposure is expected, 3M Co. part No. Scotchgrip® 847 or 1099 plastic adhesive (see TO 1-1-691 Appendix A) may be used to hold the sealing tape in place during panel installation. f. After applying the full length of the sealant tape, run fingers back and forth on the upper surface of the sealant tape to press the tape against the equipment frame flange or the access panel surface to promote adherence of the adhesive. NOTE For Av-DEC® HT3935-7 sealant tapes, this must be done before the non-stick backing is removed. g. Puncture all fastener holes using an object with a sharp point such as an awl or a scribe. NOTE As fasteners are installed, the sealant material pushed into the fastener holes will help to seal against moisture intrusion. h. Install the access door/panel. 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; MIL- PRF-63460 Corrosion Preventive Compound (CPC), or CPC material specified in the specific equipment system specific maintenance manual. 12.7 SEALING OF SPECIFIC AREAS. 12.7.1 Faying Surface Sealing. Faying surfaces are sealed by applying sealants to the connecting surfaces of two or more parts (see Figure 12-9). It is a very effective seal and should be used for all assembly or reassembly. When possible, it should be used in conjunction with fillet sealing. There are two types of faying surface seals: removable and permanent. Removable seals are used around access doors, removable panels, inspection plates, etc. A removable seal can be formed using a low adhesion sealant that adheres to both surfaces or by using a high adhesion sealant that adheres to one surface and a parting agent on the mating surface. Permanent seals are created using high adhesion sealants between permanently fastened structures. To create a permanent seal, coat either one or both mating surfaces with a high adhesion sealant before assembling the parts and then assembling them while the sealant is still wet. Apply enough sealant to force a bead to squeeze out along the joint after assembly, and also install all fasteners wet with the sealant. Assemble parts within the rated application life and/or assembly life of the sealant while taking into account the effects of temperature and humidity on these times. MIL-PRF-16173, COMPOUND, CORROSION PREVEN- TIVE 37 12-29
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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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Page 198 and 199: TO 1-1-700 11.11.2 Control of Mecha
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Page 202 and 203: TO 1-1-700 MIL-DTL-81706 (ALODINE),
Page 204 and 205: TO 1-1-700 11.13.2.3 Application of
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Page 210 and 211: TO 1-1-700 (CRES), lead, ceramic, g
Page 212 and 213: TO 1-1-700 11.13.7.2 Treatment of C
Page 214 and 215: TO 1-1-700 MIL-A-46106, ADHESIVE/SE
Page 216 and 217: TO 1-1-700 Table 12-1. Sealing Comp
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Page 226 and 227: TO 1-1-700 Figure 12-2. Sealant App
Page 228 and 229: TO 1-1-700 Figure 12-4. Rivet Appli
Page 230 and 231: TO 1-1-700 Figure 12-6. Sealant Inj
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Page 242 and 243: TO 1-1-700 MIL-PRF-81733, SEALING A
Page 244 and 245: TO 1-1-700 MIL-PRF-81733, SEALING A
Page 246 and 247: TO 1-1-700 Figure 12-12. Typical Me
Page 248 and 249: TO 1-1-700 may be used for low temp
Page 250 and 251: TO 1-1-700 Figure 12-14. Sealing Pr
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TO 1-1-700 - Robins Air Force Base

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