Regulations and Government
Major Update of Corrosion Control AC Published
The latest document builds on one released three decades ago.

The FAA has published a new draft advisory circular that summarizes the currently available data regarding identification and treatment of corrosion on aircraft structures and engine materials. AC 43-4A is an extensive update of the previous version issued nearly three decades ago. The FAA emphasized that corrosion inspections and treatment continue to be the “responsibility of you, the operator, and you should accomplish these inspections per this AC, manufacturer’s recommendations, or your own maintenance program.”


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