This notice announces the availability and required completion of
the Safety Assurance System (SAS) National/Regional Custom Data Collection Tool (C DCT)
titled “Verification of Flammability Reduction Means (FRM),” for Title 14 of the Code of
Federal Regulations (14 CFR) part 121 certificate holders, and Program Tracking and Reporting
Subsystem (PTRS) code 4635/6635, for 14 CFR part 125 certificate holders or A125 Letter of
Deviation Authority (LODA) holders and 14 CFR part 129 or § 129.14 foreign air
carriers/foreign persons, to mitigate risk associated with FRM.

This notice informs persons authorized to issue a special flight
permit (SFP) of the revised process as identified in the current edition of Federal Aviation
Administration (FAA) Order 8130.2, Airworthiness Certification of Aircraft.

This advisory circular (AC) describes methods, procedures, and practices that
have been determined to be acceptable means of showing compliance with the General Aviation
(GA) maintenance record-making and recordkeeping requirements of Title 14 of the Code of
Federal Regulations (14 CFR) parts 43 and 91. This material is not mandatory, nor is it
regulatory, and it acknowledges that the Federal Aviation Administration (FAA) will consider
other methods that may be presented. It is issued for guidance purposes and outlines several
methods of compliance with the regulations.

This advisory circular (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 the Federal Aviation Administration (FAA) emphasize here that corrosion treatment continues to be the responsibility of you, the operator, and you should accomplish these inspections per this AC, the manufacturer’s recommendations, or your own maintenance program. The information in this AC is applicable to aircraft for which the manufacturer has not published corrosion control information.