TO 1-1-700 - Robins Air Force Base

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TO 1-1-700 vertently destroy the module. Maintenance personnel should refer to MIL-HDBK-773, MIL-HDBK-263, and MIL-STD- 1686 for more detailed descriptions of ESD control measures. 8.9.3.2.1 Packaging for electrostatic discharge protection requires the use of one or more of the following materials: • MIL-PRF-81705, Type II Barrier Material, Transparent, Waterproof, Electrostatic Protective, Static Dissipative. • Cushioning material, flexible, cellular • Cushioning material, plastic open cell. • PPP-C-1797, Cushioning Material, Resilient, Low Density, Unicellular, Polypropylene Foam. 8.9.3.2.2 ESD items may be further protected in reusable A- A-59736, Type II, style D ESD Fast Pack Containers or shielded in a bag or pouch conforming to MIL-PRF-81705, Type I Barrier Material, Water Vapor-Proof, Grease-Proof, Electrostatic and Electromagnetic Protective (Opaque). 8.9.3.2.3 Protection will be provided to prevent physical damage and to maintain leads and terminals in an as-whenmanufactured condition during handling and transportation. 8.9.3.2.4 Packaging of ESD items shall be in accordance with MIL-E-17555 for electrostatic protection. Marking shall be in accordance with MIL-STD-129. 8.9.3.3 Addressing Corrosion. ESD damage to communications electronics devices can be caused by voltage or current depending on the item's composition and construction. This damage can be caused by direct contact or by the electrostatic field associated with other charged items. It is important to note that some modern military circuits are sensitive to voltages as low as 25 volts. The threshold of sensitivity or voltage level required for a human being to feel a static discharge is approximately 3500 volts. Therefore, ESD devices can be damaged by maintenance personnel without their knowledge. ESD control measures must be employed to minimize the impact of ESD damage on communications electronics parts, assemblies, and equipment. 8.9.3.3.1 Preventive Maintenance and Control. ESD devices must be protected from static fields and/or static discharge when being transported, handled, or stored. The following preventive measures will help provide this protection: a. Handle ESD devices only at protected work stations. These sites eliminate all sources of ESD with good grounding techniques by electrically bonding all the surfaces, tools, and furnishings together. A protective stool should also be used and any support equipment (soldering irons, text fixtures, test equipment, lights, etc.) must be grounded. b. ESD devices should be covered or packaged in ESDprotective packaging when not being handled. c. Conductive carriers protect static sensitive devices by shielding them from static. These carriers are used to transport, store, and ship static sensitive devices and should be placed on a conductive table top. This allows safe removal of their contents. Example of conductive carriers are conductive trays, boxes, and containers. d. Shunting mechanisms short circuit all the leads of a device. This enables the entire device to be at the same electrical potential and prevents ESD. Shunting mechanisms for discrete components include shorting clips, rings, and conductive foam. Conductive shunt bars are a type of shunting mechanism for printed circuit boards (PCBs). e. Nonconductive objects that can generate and hold different static potentials on different areas on their surface are poor conductors and cannot be grounded. Static neutralizing equipment should be used to eliminate static charges on nonconductive objects. Use of an ionized air blower will neutralize static charge by continuously blowing a cloud of ionized air over the surface. f. Personnel should not wear synthetic fiber clothes. Cotton clothes with short sleeves or a cotton smock over clothing are recommended. g. Work areas shall be clear of static hazards such as ordinary plastics, coffee cups, and candy wrappers. h. Personnel shall only use uninsulated hand tools when working with electrostatic sensitive devices. Don't use plastic-coated tweezers, plastic lead-forming tools, or plastic solder suckers. Also, personnel shall use only natural bristle brushes. 8.9.3.3.2 ESD Protective System Repair and Treatment. Corrective maintenance of ESD protection systems depends on the type of protection system involved, size of the damaged area, and degree/type of corrosion. Control, treatment, and repair measures must be employed to minimize the impact of corrosion on ESD protection systems. Maintenance personnel should refer to Chapter 7 and paragraph 8.6 of this manual and the applicable equipment system specific technical manuals for specific repair procedures. 8-40
TO 1-1-700 CHAPTER 9 INSPECTION 9.1 PURPOSE. Frequent corrosion inspections are essential for an effective overall corrosion control program. Early detection, identification, and treatment minimizes the costs resulting from corrosion damage. Without regular systemic inspections, corrosion will seriously damage Communications, Electronics, and Meteorology (C-E-M) equipment and its protective shelters and radomes. This chapter describes the basic visual and Non- Destructive Inspection (NDI) procedures for detecting corrosion as well as some of the signs of corrosion damage. 9.1.1 Responsibility. Corrosion detection is everyone's responsibility. Since corrosion can occur almost anywhere on C-E-M equipment, shelters, and radomes, all maintenance personnel must be able to identify and report corrosion problems. Personnel performing scheduled inspections shall be qualified in corrosion detection and shall have attended appropriate corrosion prevention and control courses established by AETC and the MAJCOM, and required by AFI 20-114. 9.1.2 Frequency of Inspection. The frequency and extent of inspections are established by the C-E-M and Shelter/ Radome System Program Director (SPD) and/or System Program Manager (SPM). However, during scheduled or unscheduled maintenance actions on this equipment and their components, the area involved as well as those within 36 inches (18 inches on each side) of the repair or treatment area shall be visually inspected for corrosion. Additionally, inspections of areas particularly prone to corrosion, such as shelter skids and undercarriage, door hinges, lift rings, magnesium parts, etc. may be necessary. Corrosion prone areas are discussed in Chapter 10 of this manual. 9.1.3 General Inspections. A general inspection of shelters, radomes, and C-E-M equipment is performed as follows: a. Clean area thoroughly per instructions in Chapter 8, Cleaning Procedures, of this manual. Prior to removing any access panel coated with epoxy primer, either with or without a polyurethane topcoat, score the coating system at the edges of the cover/ panel with a sharp plastic tool to prevent fraying or peeling of the paint finish system when the panel is removed for the first time after the finish system is applied. b. If corrosion is suspected, examine the area with a 10X magnifying glass and flashlight. Pay particular attention to edges of skin panels, rivet heads, and other corrosion prone areas. If blisters, bubbles, or other coating irregularities are present, attempt to dislodge the paint scraping with a sharp plastic tool. If paint does not dislodge easily, the irregularity is probably a sag or run which is confined to the paint film itself and no further action is necessary. When corrosion is suspected but no irregularities are present, clean and dry the area per procedures in Chapter 8 of this manual, and apply a Strip 3M Co. part No. 250 (preferred) or A-A-883, Type II flat-back masking tape over the suspect area leaving a two inch length free at one end. Hand rub the tape for several strokes in order to assure good adhesion. Grip the free end of the tape and remove the tape with an abrupt lifting motion. Where paint is removed, inspect and determine the extent/degree of corrosion as described in Chapter 9 of this manual. c. Remove corrosion, clean, and treat the surface per procedures in Chapters 7 and 11 of this manual, and touchup the paint per procedures in TO 1-1-8. 9.1.4 Detailed Inspections. A detailed inspection of C-E- M equipment, Shelters, and Radomes shall be performed if the corrosion damage found during a general inspection is suspected to be extensive or severe, and/or as specified in appropriate system specific CEM/Shelter/Radome equipment maintenance manuals. See Chapter 10 of this manual for information on common corrosion prone areas. 9.2 INSPECTION METHODS. The most likely methods of inspection encountered on C-E-M equipment are discussed in this paragraph. 9.2.1 Visual Inspection. Visual inspection is the most widely used method for the detection and evaluation of corrosion. It is very effective for detecting most types of corrosion if done carefully with a knowledge of where and for what to look. Read Chapter 3 before performing a corrosion inspection, paying particular attention to Table 3-1. The following tools can be used to find and evaluate the extent of corrosion damage: flashlight; 10X magnifying glass; plastic or nonmetallic scraper; and depth gage, pin micrometer type. 9.2.1.1. First, conduct an overall general inspection to note obvious corrosion, corrosion products, or coating defects. Further examine damaged or deteriorated areas using a 10X magnifier and flashlight. Edges of panels, rivet heads, razor edge Change 3 9-1
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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,
Page 118 and 119: TO 1-1-700 c. Cadmium plated surfac
Page 120 and 121: TO 1-1-700 a. Scuff sand and feathe
Page 122 and 123: TO 1-1-700 7.7.7.2 If surface is no
Page 124 and 125: TO 1-1-700 7.7.9.2 Where only parti
Page 126 and 127: TO 1-1-700 7.8.1 Type I Application
Page 128 and 129: TO 1-1-700 Extend (Loctite) 32150 J
Page 130 and 131: TO 1-1-700 There are three ways to
Page 132 and 133: TO 1-1-700 vulnerable surfaces clea
Page 134 and 135: TO 1-1-700 Table 8-2. Materials, Th
Page 136 and 137: TO 1-1-700 Table 8-4. Electronic Cl
Page 150 and 151: TO 1-1-700 Table 8-5. Accessories o
Page 152 and 153: TO 1-1-700 Table 8-5. Accessories o
Page 154 and 155: TO 1-1-700 f. Devices with permanen
Page 156 and 157: TO 1-1-700 Table 8-7. Cleaning and
Page 158 and 159: TO 1-1-700 MIL-PRF-87937, CLEANING
Page 160 and 161: TO 1-1-700 of contamination). Maint
Page 162 and 163: TO 1-1-700 8.8.2 Protective Coating
Page 164 and 165: TO 1-1-700 • Tube clamps. • Min
Page 166 and 167: TO 1-1-700 a. For bonding/grounding
Page 170 and 171: TO 1-1-700 doors, and other corrosi
Page 173 and 174: TO 1-1-700 CHAPTER 10 CORROSION PRO
Page 175 and 176: TO 1-1-700 MIL-PRF-81733, SEALING A
Page 177 and 178: TO 1-1-700 d. After corrosion is re
Page 179 and 180: TO 1-1-700 (3) Stainless/CRES steel
Page 181 and 182: TO 1-1-700 10.9 WATER ENTRAPMENT AR
Page 183 and 184: TO 1-1-700 f. Shield equipment from
Page 185 and 186: TO 1-1-700 b. Use e-inch rivnuts of
Page 187 and 188: TO 1-1-700 10.17.3 If the plating s
Page 189: TO 1-1-700 Figure 10-16. Dissipatio
Page 192 and 193: TO 1-1-700 (2) If allowable damage
Page 194 and 195: TO 1-1-700 Table 11-1. Recommended
Page 196 and 197: TO 1-1-700 11.6 3M CO. SCOTCH-BRITE
Page 198 and 199: TO 1-1-700 11.11.2 Control of Mecha
Page 200 and 201: TO 1-1-700 11.12.2 Mechanical Damag
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
Page 206 and 207: TO 1-1-700 only when there is no da
Page 208 and 209: TO 1-1-700 NOTE SEMCO PASA-JELL 101
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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TO 1-1-700 Table 12-1. Sealing Comp
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TO 1-1-700 used to apply sealants i
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TO 1-1-700 Figure 12-2. Sealant App
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TO 1-1-700 Figure 12-4. Rivet Appli
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TO 1-1-700 Figure 12-6. Sealant Inj
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TO 1-1-700 below and adhere very po
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TO 1-1-700 Table 12-2. Time Require
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TO 1-1-700 Table 12-2. Time Require
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TO 1-1-700 of 20 to 25 seconds in a
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TO 1-1-700 d. Remove all uncured se
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TO 1-1-700 MIL-PRF-81733, SEALING A
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TO 1-1-700 MIL-PRF-81733, SEALING A
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TO 1-1-700 Figure 12-12. Typical Me
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TO 1-1-700 may be used for low temp
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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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