Improved Flammability Standards for Thermal/Acoustic Insulation Materials Used in Transport Category Airplanes

The FAA is adopting upgraded flammability standards for thermal and acoustic insulation materials used in transport category airplanes. These standards include new flammability tests and criteria that address flame propagation and entry of an external fire into the airplane. This action is necessary because the current standards do not realistically address situations in which thermal or acoustic insulation materials may contribute to the propagation of a fire. This action is intended to enhance safety by reducing the incidence and severity of cabin fires, particularly those in inaccessible areas where thermal and acoustic insulation materials are installed, and providing additional time for evacuation by delaying the entry of post-crash fires into the cabin.