US flight shutdown exposes deepening air traffic network crisis

The shutdown came on the same day the White House and Transportation Department sought another US$30.1 billion from Congress to upgrade airports and air traffic control, including US$10.1 billion for air traffic control modernisation.

Much of the system’s underlying weakness has been documented for years.

The Government Accountability Office reported in 2024 that the FAA had classified 51 of its 138 air traffic control systems as unsustainable and another 54 as potentially unsustainable. Together, they accounted for more than three-quarters of the systems reviewed.

FAA Administrator Bryan Bedford told Reuters in September that the agency’s more than 300 air traffic facilities operated as technological silos, relying in some cases on decades-old computers and telecommunications systems that cannot communicate seamlessly with one another.

Some obsolete equipment requires replacement parts obtained through online auction websites or made using 3D printing.

BACKUP SYSTEMS UNDER STRAIN

An incident in September demonstrated how one communications failure could be compounded by another.

After error messages appeared on a telecommunications circuit serving a Philadelphia air traffic control facility, the FAA’s contractor switched to a backup fibre-optic line. A construction crew then accidentally severed that line in New Jersey, contributing to widespread disruption. About 9,500 US flights were delayed or cancelled that day.

“When it fails, we just don’t have the redundancy that we would get if we had a modern architecture,” Bedford said at the time.

Friday’s shutdown was the first nationwide ground stop since January 2023, when a failure of the FAA system that distributes critical safety notices to pilots halted departures for less than two hours and disrupted more than 10,000 flights.