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Advisory Circular 25.856-1, Thermal/Acoustic Insulation Flame Propagation Test Method Details

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Information about this document as published in the Federal Register.

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Federal Aviation Administration (FAA), DOT.


Notice of availability of Advisory Circular (AC) 25.856-1.


This AC provides methods acceptable to the Administrator for showing compliance with the revised airworthiness standards concerning new fire protection requirements applicable to thermal/acoustic insulation materials. The guidance in this AC describes a test method to determine the flammability and flame propagation characteristics of thermal/acoustic insulation materials on transport category airplanes.

How to Obtain Copies: A paper copy of AC 25.856-1 may be obtained by writing to the U.S.Department of Transportation, Subsequent Distribution Office, DOT Warehouse, SVC-121.23, Ardmore East Business Center, 3341Q 75th Ave., Landover, MD 20785, telephone (301) 322-5377, or faxing your request to the warehouse at (301) 386-5394. The AC also will be available on the Internet at​rgl.

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Ali Bahrami,

Manager, Transport Airplane Directorate, Aircraft Certification Service.

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[FR Doc. 05-14252 Filed 7-19-05; 8:45 am]