TO 1-1-700 - Robins Air Force Base

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TO 1-1-700 c. Remove and replace any gasket that shows signs of a permanent set, as this condition prevents proper sealing. 2.3.8 Hardware. Ensure that all hardware such as carrying handles, latches, and hinges are fastened securely in place and are finished per the equipment specifications and drawings. Ensure that all latches and hinges operate freely with no sticking or binding and that all latches snap firmly in place and hold latched parts tightly together to prevent moisture entry into a piece of equipment. Consult Chapter 10 of this manual for periodic lubrication and preservation procedures for these parts. 2.3.9 Keys and Switches. Inspect key and switch frames and plungers for corrosion, wear, bending, and any other distortion that would interfere with the proper functioning of the key or switch, and correct any problems found by removing the corrosion if possible, replacing the mechanically defective part, and/or properly lubricating working mechanisms with an avionics grade lubricant/preservative per Chapter 8 of this manual. 2.3.9.1 Ensure that plungers of push button and twist type keys operate freely in the key frame but that any side thrust on the plunger will not operate spring contacts. 2.3.9.2 Ensure that levers of lever type keys operate freely in either direction without binding and that levers return unaided from their operational position on lock combinations before traveling approximately one-half the total allowable lever travel distance when released from the operational position. 2.3.9.3 Ensure that any cam rollers associated with keys turn freely on their bearings and that plunger springs of non-locking spring combinations press against the cam rollers with enough force to return the key lever to its normal operational position when it is released from the operational position. 2.3.9.4 Ensure that rotary switches have a positive mechanical index at both the CONTACT and OFF positions so that the rotating shaft stops only at those positions. 2.3.9.5 Inspect all accessible type relays for condition of contacts, arching, chatter, proper alignment, and proper operational control functions. Adjust, clean, and burnish contacts as required per procedures in Chapter 8 of this manual. 2.3.10 Mounting of Parts. To ensure proper equipment operation and prevent moisture entry into the faying surface area of mounted parts and subsequent corrosion problems, ensure that all parts are securely mounted and that all missing hardware and components are replaced. 2.3.10.1 All mounting screws, nuts, bolts, rivets and welds shall be tight when checked by hand and/or with a suitable tool. All required lock-washers and cotter pins shall be installed and tight where used on mounting screws, bolts, nuts, and linkage assemblies. 2.3.10.2 Knurled surfaces shall not be worn smooth or severely, mechanically damaged, and threaded parts shall not have stripped or cross threaded threads. 2.3.11 Mechanical Parts. Ensure that mechanically operated parts, such as gears, sprockets, and claws, operate freely without binding or excessive looseness and are free of worn, bent, broken, or burred teeth. Periodic lubrication with the lubricant specified in the equipment system specific maintenance manual will ensure that these parts continue to function properly and free of corrosion. 2.3.12 Plastic, Glass, and Ceramic Parts. Ensure that plastic and glass parts are free of cracks, breaks, severe chipping or scratching that would impair their proper functioning, allow leakage of moisture into a piece of equipment and cause corrosion, or present a personnel hazard due to sharp edges. Finished surfaces of plastic parts shall be free of burned or melted spots and warping. Ceramic parts shall be free of surface cracks and glazing, but minor chipping is allowed as long as it does not interfere with proper functioning or impair the insulating properties of the parts. If these conditions are found, the parts shall be replaced. 2.3.13 Rubber Parts. Ensure that rubber parts, such as grommets, gaskets, seals, etc., are in a sufficiently live or resilient condition to allow them to function. Rubber parts that are cut, torn, crushed, permanently set, worn, or embrittled to the point they will not function properly shall be replaced. Defective gaskets and seals are of particular concern as they will allow moisture entry into equipment and cause corrosion. 2.3.14 Resistors. Inspect resistors for chipping and/or cracking that results in exposure of the resistive element, an illegible color codes, and an ohmic value outside the specified tolerance range. If any of these conditions exist, the resistor shall be replaced because exposure of the resistive element can lead to corrosion of the element and illegible color codes, and out of tolerance conditions can lead to improper circuit resistances; all of which can cause the equipment in which the resistors are installed to malfunction. Potentiometer type resistors shall have center arms that operate smoothly with no evidence of scratching, dead spots caused by contact corrosion, or a burned out portion that causes loss of electrical contact. Refer to Chapter 8 of this manual if any of these conditions are found. 2.3.15 Spring Assemblies. Inspect keys, jacks, relays, and similar types of spring assemblies to ensure they are tightly and securely assembled with spring contacts that line up so that the contact point of each falls within the boundary of the 2-6
TO 1-1-700 opposing contact and are approximately straight and free of sharp bends (gradual bowing is allowed). Ensure also that insulators are not cracked or broken to the point that shorting can occur. Chipped insulator edges are allowed as long as the chipped area does not extend below the spring contact. Inspect contacts for heavy build-up of soils, tarnishing, and pitting that penetrates through the plating to the base metal. If the contact area is heavily soiled, tarnished, or has minor pitting, clean and/or remove the tarnish and minor pitting per procedures in Chapter 8 of this manual. If severe pitting is found, replace the part. 2.3.16 Sockets and Plug-In Devices. Inspect plug-in devices for firm seating that produces reliable electrical contact in their sockets and for sockets that are not cracked or badly chipped. If badly chipped and/or cracked sockets and/or poor electrical contact are noted, replace the plug-in device. 2.3.16.1 Inspect sockets designed to absorb vibration for loss of resiliency through normal aging and/or over-tightening of their rubber mountings. If this condition exists, replace the plug-in device. 2.3.16.2 Inspect all terminals and prongs for corrosion, bending, breaks, burning, and contact positioning not conforming to the connector design parameters. If any of these conditions are found, attempt to correct the conditions per procedures in Chapter 8 of this manual. Replace any connector that can not be made serviceable by those procedures. 2.3.17 Fuses and Fuse Holders. Ensure that fuses and fuse holders are free of corrosion, cracks, and any evidence of overheating and that indicating type fuse holders illuminate when the installed fuse is open and its associated circuit is energized. Corroded, cracked, and overheated fuses shall be replaced. Cracked fuse holders shall be replaced while corroded ones shall be treated per procedures in Chapters 8 and 11 of this manual to remove the corrosion and replaced if this is unsuccessful. When overheating is indicated, its source shall be determined and the problem corrected. 2.3.18 Panel Lamps. Ensure that panel indicator lamps operate per design and applicable technical data parameters. The glass jewels or lenses shall be the proper color and not cracked, broken, or discolored/darkened by heat emitted by the installed bulbs. Lenses showing any of these conditions shall be replaced. Bulbs that are burned out or have corroded bases and bulb sockets that are corroded shall also be replaced. 2.3.19 Shock Mounts. Ensure that shock mounts are in good condition and cushion the equipment mounted on them properly. Shock mounts with severe corrosion and/or with other defects that impairs proper functioning shall be replaced. Shock mounts with minor to moderate corrosion that does not impair their function shall have the corrosion removed by an appropriate procedure in Chapter 11 of this manual. 2.3.20 Safety Interlock Switches. Ensure that all safety interlock switches on equipment doors and/or panels operate with a very positive action to make or break electrical contact with no sluggishness when the doors or panels are opened and/ or closed. All slow acting and/or non-acting safety interlock switches caused by extremely dirty, corroded, or otherwise defective contacts and/or plungers shall be replaced. All manually operated safety interlock bypass switches shall function properly or they shall be replaced. CAUTION plates for these manual switches shall be in place and legible or they too shall be replaced. 2.3.21 Vibrators. Ensure that vibrator cans are not severely corroded or dented, show no evidence of tampering, and have straight pins with no cracks in the base. When vibrator cans have any of the above noted defects, the vibrators shall be replaced. Minor corrosion on the exterior of vibrator cans can be removed by an appropriate non-powered abrasive method in Chapter 11 of this manual. 2.3.22 Motors, Generators, Blowers, and Fans. Ensure that motors, generators, blowers, and fans are mounted securely and operate without excessive vibration and noise. Make sure these components are free of corrosion, clean, properly lubricated, show no evidence of overheating, and have free moving blades that do not contact enclosures or other stationary parts. Clean and lubricate these components periodically as required by the equipment system specific maintenance manuals to prevent corrosion and ensure proper operation. 2.3.23 Waveguide Assemblies. Ensure that waveguide assemblies, including any platings used on them, are free of dents, pitting and other types of corrosion, and arc burns. Minor corrosion on exterior surfaces at places where the organic finish system is damaged or deteriorated can be removed by an appropriate non-powered abrasive method (the mildest method that is effective) per procedures in Chapters 8 and 11 of this manual followed by touch-up of the finish system with a like material applied per procedures in TO 1-1-8. More extensive corrosion on exterior surfaces and any corrosion on interior surfaces of waveguide assemblies requires replacement of the assemblies. 2-7
Page 1 and 2: TO 1-1-700 TECHNICAL MANUAL CORROSI
Page 3 and 4: TO 1-1-700 TABLE OF CONTENTS Chapte
Page 5 and 6: TO 1-1-700 TABLE OF CONTENTS - CONT
Page 13 and 14: TO 1-1-700 LIST OF ILLUSTRATIONS -
Page 15 and 16: TO 1-1-700 FOREWORD 1. PURPOSE. The
Page 17 and 18: TO 1-1-700 List of Related Publicat
Page 19 and 20: TO 1-1-700 SAFETY SUMMARY 1. GENERA
Page 21 and 22: TO 1-1-700 AMS-G-6032, GREASE, PLUG
Page 23 and 24: TO 1-1-700 MIL-DTL-64159, COATING,
Page 25 and 26: TO 1-1-700 MIL-PRF-27617, GREASE, A
Page 27 and 28: TO 1-1-700 O-L-164, DRESSING, LEATH
Page 29: TO 1-1-700 MIL-T-81772, THINNER, PO
Page 32 and 33: TO 1-1-700 tronics equipment and th
Page 34 and 35: TO 1-1-700 cleaning situation, syst
Page 36 and 37: TO 1-1-700 c. Riveted joints shall
Page 40 and 41: TO 1-1-700 MIL-L-87177, LUBRICANT,
Page 42 and 43: TO 1-1-700 Figure 3-1. Simplified C
Page 44 and 45: TO 1-1-700 resistant, and also at t
Page 46 and 47: TO 1-1-700 is first noticeable as a
Page 48 and 49: TO 1-1-700 3.7.8 Oxygen Concentrati
Page 50 and 51: TO 1-1-700 Figure 3-14. Concentrati
Page 52 and 53: TO 1-1-700 Figure 3-17. Galvanic Se
Page 54 and 55: TO 1-1-700 Figure 3-20. Aluminum Su
Page 56 and 57: TO 1-1-700 3.8.7 CRES/Stainless Ste
Page 58 and 59: TO 1-1-700 3.9.10 Climate. Warm, mo
Page 60 and 61: TO 1-1-700 3.11 PREVENTATIVE MAINTE
Page 63 and 64: TO 1-1-700 CHAPTER 4 COMPOSITE AND
Page 65 and 66: TO 1-1-700 4.4.4.4 Glass parts shal
Page 67 and 68: TO 1-1-700 CHAPTER 5 PACKAGING (STO
Page 69 and 70: TO 1-1-700 extent of damage dependi
Page 71 and 72: TO 1-1-700 5.15 PRECAUTIONS FOR VCI
Page 73 and 74: TO 1-1-700 c. Secure the desiccant
Page 75 and 76: TO 1-1-700 Figure 5-8. Shock Isolat
Page 77 and 78: TO 1-1-700 Figure 5-9. Examples of
Page 79 and 80: TO 1-1-700 5.24.10 Rigid or Flexibl
Page 81 and 82: TO 1-1-700 CHAPTER 6 MOISTURE AND F
Page 83 and 84: TO 1-1-700 c. 6.2.6 Felt. Examine f
Page 85 and 86: TO 1-1-700 a. After first directing
Page 87: 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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TO 1-1-700 11.6 3M CO. SCOTCH-BRITE
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TO 1-1-700 11.11.2 Control of Mecha
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TO 1-1-700 11.12.2 Mechanical Damag
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TO 1-1-700 MIL-DTL-81706 (ALODINE),
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TO 1-1-700 11.13.2.3 Application of
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TO 1-1-700 only when there is no da
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TO 1-1-700 NOTE SEMCO PASA-JELL 101
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TO 1-1-700 (CRES), lead, ceramic, g
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TO 1-1-700 11.13.7.2 Treatment of C
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TO 1-1-700 MIL-A-46106, ADHESIVE/SE
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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 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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