AC 43-4B - Corrosion Control for Aircraft (FAA Advisory Circular) Paperback – November 27, 2024

AC 43-4B - Corrosion Control for Aircraft with Editorial Update #2. (Black & white print)This AC provides guidance to aircraft operators and maintenance, repair, and overhaul (MRO) organizations for the development of a corrosion control program. This AC applies to Title 14 of the Code of Federal Regulations (14 CFR) parts 121, 129, and 135 operators. This AC is a summary of the current available data regarding identification and treatment of corrosive attack on aircraft structures and engine materials. Corrosion inspection frequency, corrosion identification, and especially corrosion treatment continues to be the responsibility of the operator. These inspections should be accomplished per this AC, the manufacturer’s recommendations, or the operator’s own maintenance program. The procedures in this AC are an acceptable means, but not the only acceptable means, of corrosion treatment.The information in this AC is applicable to aircraft for which the manufacturer has not published corrosion control information. Where the airframe or engine manufacturer has published a recommended corrosion inspection schedule and treatment program, the applicable program must take precedence over the recommendation of this AC. The contents of this document do not have the force and effect of law and are not meant to bind the public in any way, and the document is intended only to provide information to the public regarding existing requirements under the law or agency policies. This AC is intended for use by persons performing maintenance, alteration, or preventive maintenance on aircraft, engines, propellers, or appliances in accordance with 14 CFR part 43. Read more