2120-AK34 202504 Unified Agenda of Federal Regulatory and Deregulatory Actions 2120 Federal Aviation Administration FAA 2100 Department of Transportation DOT Interior Parts and Components Fire Protection for Transport Category Airplanes

The FAA is amending certain airworthiness regulations for fire protection of interior compartments on transport category airplanes. These amendments convert those flammability regulations from detailed, prescriptive test requirements into simpler, performance-based standards. These amendments divide these standards into two categories: those designed to protect the airplane and its occupants from the hazards of in-flight fires, and those designed to protect the airplane and its occupants from the hazards caused by post-crash fires. In addition, these amendments remove test methods from the regulations and allow applicants, in certain cases, to demonstrate compliance either without conducting tests or by providing independent substantiation of the flammability characteristics of a proposed material. This action eliminates unnecessary testing, increases standardization, and improves safety. These amendments include conforming changes to parts 25, 27, 29, 91, 121, 125, and 135.

]]> Substantive, Nonsignificant Previously Published in The Unified Agenda Final Rule Stage No No Deregulatory 14 CFR 25 14 CFR 27 14 CFR 29 14 CFR 121 14 CFR 125 14 CFR 135 14 CFR 91 49 U.S.C. 106(f) 49 U.S.C. 44701 49 U.S.C. 44704 No NPRM 07/03/2019 84 FR 31747 NPRM Comment Period End 10/01/2019 NPRM Comment Period Extended 10/02/2019 84 FR 52392 NPRM End of Extended Comment Period 12/02/2019 Second NPRM 08/17/2023 88 FR 55941 Comment Period Extended 10/02/2023 88 FR 67684 Second NPRM Comment Period End 10/02/2023 Second NPRM Extended Comment Period End 11/30/2023 Final Rule 01/00/2026 None. No No None No No www.regulations.gov www.regulations.gov No No John Shelden Aircraft Certification Service 2120 Federal Aviation Administration FAA 206 231-3214 john.shelden@faa.gov 2200 S 216th Street, Des Moines WA 98198-6547