Index Removal Priority .................................................................................................................... 181, 186 Repair of
Avionics Equipment Housings, Mounting Racks, and Storage Hardware99-111
Bilge Areas99
Cockpit and Control Boxes105
Electrical Bonding and Grounding Straps109
Engine Compartments100
Equipment Bays99
Equipment Covers, Hinges, and Latches ................................................................... 107, 108
External Mounted Equipment105
Frames, Mounting Racks, and Shock Mounts103
Internal Metal Surfaces146
Moisture Traps and Cavity Areas109
Terminal Boards, Junction Boxes, Relay Boxes, and Circuit Breaker Panels107
Avionics Systems, Equipment, and Components111
Aluminum Electrolytic Capacitors138
Antenna Bonding/Ground Connection124
Electrical Resistance Test124
Antenna Connectors121
Antenna Mounting Area Preparation Procedures .............................................. 111, 116, 119
Antenna Systems111
ATE Cabinets, Doors, and Panels125
Battery Compartments ............................................................................................... 100, 126
Cleaning Versus Calibration124
Coaxial Connectors145
Corrosion Visual Inspection .............................................................................. 111, 169, 170
Edge Connectors and Mating Plugs137
External Corrosion Removal and Cleaning ............................................................... 140, 141
Filters145
Flush or Dome Antenna Mounting119
Handling, Storage, and Packaging132
Internal Cleaning of General Purpose Test Equipment128
Internal Cleaning of Microwave Test Equipment129
Internal Corrosion Removal and Cleaning142
Lighting Systems and Assemblies133
Long Wire/Direction Finder Sense Antenna123
Meters126
Multi-pin Electrical Connectors, Cleaning, and Preservation ................................... 130, 139
Operator and Instrument Panels126
Painting Systems131
Printed Circuit Boards ............................................................................................... 130, 145
Battery Compartments, Boxes, and Adjacent Areas100
Radar Antenna Associated Hardware121
Relays and Circuit Breakers ............................................................................................. 130, 135 Sealing Connector Back shells ......................................................................................... 143, 144
Sensitive Internal Metal Surfaces146
Special Cleaning Procedures130
Support Equipment/General Purpose Test ....................................................................... 127, 128 Equipment Covers and Housings ..................................................................................... 107, 125 Switches ........................................................................................... 105, 126, 127, 130, 136, 188
Temporary Dish Protection121
Index
UHF/VHF/ADF Antenna Sealing122
Wave guide Feed Horns133
Wave guides ....................................................................................... 24, 51, 56, 69, 87, 129, 132
Wet-Slug Tantalum Capacitors137
Wire Harnesses and Cables .............................................................................................. 145, 192 Repair Station
Cleaning Priority193
Damaged Items194
Disassembly Inspection Procedures193
Emergency Cleaning and Preservation Procedures194
Emergency Reclamation Team ........................................................................................ 181, 192
Initial Screening Procedure193
Required Tools, Material, and Equipment182
Undamaged Items194
S
Sealants90
Shelves, Bulkheads, and Crevices109
Shielding Requirements162-165
Silver .................................................................................................................................... 8, 35, 173
Sodium Bicarbonate Neutralizing Solution101
Solvent Ultrasonic Cleaner53
Solvent Method183
Solvent Vapor Drying63
Special Cleaning Procedures130
Special Considerations ............................................................................................................... 26, 61
Special Precautions89
Stress Corrosion19
Support Equipment .............................................................................................. 45-53, 125-129, 182
General Purpose Test Equipment125-128
Covers and Housings ....................................................................................................... 107, 125 Surface Preparation ....................................................................................................... 59, 78-82, 149 Surface Treatment ................................................................................................... 9, 74-77, 112, 171
Chemical Conversion Materials Procedures74-77
Switches and Circuit Breakers ................................................................................................ 136, 188 T Temperature ....................................... 8, 9, 11, 13, 26, 62, 63, 76, 77, 84, 85, 88-90, 92, 95, 184, 185
Temporary Dish Protection121
Terminal Boards, Junction Boxes, Relay Boxes, and Circuit Breaker Panels ....................... 107, 191 Testing and/or Repair Practices .............................................................................................. 178, 179 Tin .............................................................................................................................. 7, 10, 18, 34, 35
Treatment of Other Metals77
Triboelectric Series ................................................................................................................. 172, 173 Types of Corrosion ................................................................................................................ 15, 31-36
Crevice Corrosion15
Exfoliation Corrosion19
Fretting Corrosion16
Galvanic Corrosion ................................................................................................................ 8, 17
Index Intergranular Corrosion ........................................................................................................ 19, 34
Metal Ion Concentration Cell15
Nonmetallic Deterioration19
Oxygen Concentration Cell15
Pitting16
Stress Corrosion19
Uniform Surface Corrosion15
Types of ESD Failures
Catastrophic Failures175
Intermittent Failures174
Typical ESD Protective Packaging Workstation177
U
UHF/VHF/ADF Antenna Sealing122
Undamaged Items194
Uniform Surface Corrosion15
V Vacuum Oven Drying ........................................................................................................ 63, 89, 185 Vented Drying Oven ................................................................................................................ 63, 185 Vented Drying Oven (Bulb-Type) ............................................................................................ 63, 185 Visual Inspection ............................ 8, 28-31, 58-60, 99, 111, 125, 133, 138-142, 169, 170, 193, 194 W Water Displacing and Treatment ........................................................................................ 144, 183, 194
Displacing Method184
Intrusion .................................................................... 6, 9-13, 21, 25, 30, 31, 55, 65, 90, 140, 145
Intrusion Inspection30
Base Solvent Spray Booth ................................................................................................... 51, 52
Wave guide Feed Horns133
Wet-Slug Tantalum Capacitors137
What Not to Preserve ................................................................................................................. 65, 66
What to Preserve65
When to Preserve ........................................................................................................................ 64, 65
Why Preserve64
Wire Harnesses and Cables .................................................................................................... 145, 192 X Y Z
Advisory Circular Feedback Form If you find an error in this AC, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by contacting the Flight Standards Directives Management Officer at 9-AWA-AFB-120-Directives@faa.gov.
Subject: AC 43-206, Inspection, Prevention, Control, and Repair of Corrosion on Avionics Equipment Date: _____________________ Please check all appropriate line items:
An e rror ( proc edural or typographical) has been noted in paragraph ____________ on page _______.
Recommend paragraph _____________ on page __________ be changed as follows:
______________________________________________________________________ ______________________________________________________________________ In a future change to this AC, please cover the following subject:
(Briefly describe what you want added.)
______________________________________________________________________ ______________________________________________________________________ Other comments:
______________________________________________________________________ ______________________________________________________________________ I would like to discuss the above. Please contact me.
Submitted by: Date: ______________________