> If Congress can’t act to head off a shutdown and FAA lapse by Sunday, most air traffic controllers will continue working without pay, but some 2,600 controllers in training — including 1,000 that are already working in FAA centers nationwide — will be forced to go home, putting significant strain on an already stressed system.
> Grant money for important safety improvements will stop and some regulations in process, such as ones intended to shore up passenger protections, will grind to a halt. And the country’s aviation system will lose an estimated $54 million a day in fuel and fare tax revenues.