Index Heated Compartment .............................................................................................................. 185, 186 Hermetically Sealed Avionics Equipment .................................................................................. 9, 187 High Temperature ....................................................................................................................... 13, 92 Hot Air Blower ................................................................................................................. 62, 182, 185
How to Preserve66
Human Body Generated ESD174
Humidity Indicators72
I
In-Place Cleaning190
Inspection Procedures169
General Inspection Procedure30
Inspection Factors28
Water Intrusion Inspection30
Intermittent Failures174
Intergranular Corrosion .............................................................................................................. 19, 34 Internal Cleaning of
Automatic Test Equipment125
General Purpose Test Equipment125-128
Microwave Test Equipment129
Support Equipment ..................................................................................... 45, 107, 124-128, 182 Intrasystem/Intersystem EMI ................................................................................................. 160, 167 Ion ................................................................................................................................................. 5, 15 Iron and Steel ................................................................................................................................ 7, 32 J K L
Latent Failures175
Lighting Systems and Assemblies133
Lightning ................................................................................................................................ 161, 162
Litmus Indicating Solution100
Long Wire and Direction Finder (DF) Sense Antenna Corrosion123
Prevention Procedures123
Lubricants68
M
Maintenance Functions77
Magnesium ........................................................................ 7, 9, 18, 33, 74-76, 83, 108, 151, 153, 155
Magnesium Surface Treatment76
Man-made Environments13
Manufacturing Processes9
Material
Compatibility8
Selection and Use7
Identification Label49
Index Used for Cleaning ........................................................................................................... 46-49, 53
Metallic Equipment Covers and Housings107
Methods of Application88
Methods of Minimizing the Effects of ESD177-180
Meters ............................................................................................................................... 89, 124, 126
Micro-organism, Insect, and Animal Attack13
Military Specifications6
Moisture and Other Fluid Intrusion Sources .......................................................................... 9, 11, 21 Traps and Cavity Areas ........................................................................................................ 7, 109
Mounting Racks and Shock Mounts189
Multi-pin Electrical Connectors, Cleaning and Preservation .......................................... 130, 139-145 N Nonmetallic Deterioration .......................................................................................................... 19, 36 Non-removable Avionics Equipment ..................................................................................... 190, 191 O Operator and Instrument Panels ............................................................................................. 126, 127
Operator/Unit Level Emergency Cleaning Procedures186-192
Antennas189
Cockpit Area Components ............................................................................................... 188, 189
Electrical Connectors and Receptacles191
Electric Motors and Generators188
Hermetically-Sealed Avionics Equipment187
In-Place Cleaning190
Mounting Racks and Shock Mounts189
Non-removable Avionics Equipment190
Removable Avionics Equipment186
Switches and Circuit Breakers188
Terminal Boards, Junction Boxes, Relay Boxes, and Circuit Breaker Panels191
Wiring Harnesses and Cables192
P Packaging
and Storage68-72
Desiccants70-72
Electrical Connector and Wave Guide Caps69
Handling ............................................................................................................................... 68, 69
Humidity Indicators72
Paint Systems ........................................................................................................................... 78, 131 Painting Equipment and Materials ............................................................................................. 78, 79 Pitting ............................................................................................................................. 16, 32, 34, 36
Post-Cleaning Procedure61
Post-Treatment of Conversion Coated Surfaces77
Potting Compounds ............................................................................................................. 83-86, 140
Precipitation Static162
Preservation
How to Preserve66
Index Preservative Materials ................................................................................................................ 66, 67 What Not to Preserve ........................................................................................................... 65, 66
What to Preserve65
When to Preserve ................................................................................................................. 64, 65
Why Preserve64
Pressure Air .................................................................................................................................. 13, 51, 72
Contact12
Prime Sources of Static Charge172-174
Production Planning182
Program Requirements20
Proper Package Practices .......................................................................................................... 69, 180
Protective Coatings77-83
Application of Coatings80
Application of Primer80
Application of Topcoat83
Printed Circuit Boards (PCB) .................................... 7, 8, 16, 50, 51, 53, 62, 68, 84, 93-98, 130, 145
Purple Plague35
Q R
Radar Antenna Associated Hardware121
Radar Dish Antenna Corrosion Prevention Procedures121
Recognizing Avionics Corrosion31
Aluminum32
Black Plague35
Cadmium35
Corrosion Effects of Solder Flux37
Corrosion Effects on Nonmetals36
Corrosion Resistant Steel32
Copper33
Effects of Insect and Animal Attack38
Effects of Microbial Attack37
Gold and Gold Plating35
Iron and Steel32
Magnesium33
Nickel35
Purple Plague35
Red Plague35
Silver35
Tin35
Recommended Practices for ESD Sensitive Equipment180
Basic ESD Precautions178-180
Packaging Practices178-180
Sensitive Device Handling Practices178-180
Testing and/or Repair Practices178-180
Red Plague35
Relay and Circuit Breakers135
Removal and Cleaning of Identification and Modification Plates186
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.
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