A bill to provide for progress reports on the national transition plan related to a fluorine-free firefighting foam.

S 4319 requires the FAA Administrator to submit regular progress reports to Congress on transitioning U.S. airports to fluorine-free firefighting foam. Specifically, it mandates reports every 180 days (starting 180 days after enactment) detailing progress at certified airports (part 139 airports), including current foam inventory, guidance for environmental limits and military transition, decontamination practices, and timelines for implementing new foam standards. The reports must also cover how non-certified airports and local authorities are being supported with similar guidance. The requirement ends when the FAA notifies Congress the national transition plan is complete.