AC 43-206

Change 1

Advisory circular · Inspection, Prevention, Control, and Repair of Corrosion on Avionics Equipment

Approved
August 7, 2024
Last reviewed
August 12, 2024
This change
CHG 1 of AC 43-206.
Cancels
AC43-206
Family
AC 43-206 · 2 versions
Revision
change 1
14 CFR parts
43
Cited by
2 ADs

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

Show pages 221–232
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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

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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

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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: ______________________