Transportation Secretary Sean Duffy mentioned Saturday that a nationwide floor cease halting flights throughout the US was attributable to seemingly routine upkeep work.

Duffy mentioned that in “routine upkeep,” copper wire at a distant location was being upgraded to fiber optic cable by L3Harris, a longtime contractor for the Federal Aviation Administration. After the improve, a router overloaded a essential communication system, resulting in the bottom cease.

“It’s fairly easy work that we had been doing yesterday at, once more, a really distant location,” Duffy mentioned throughout a Saturday press convention that appeared to have technical problems with its personal. “What we’re working to find out was whether or not we had incompetence — which means, was it person error or installator error from L3Harris? Or did they set up a defective router?”

The FAA’s appearing CTO Rebecca Man added, “Once we began to see the prevalence the place our community was having instability, we began to have a look at what was the trigger. And as such, we noticed two locations that had been really pinging our community at a really excessive fee — a thousand connections over each 4 to 5 seconds.”

Man mentioned the FAA disabled “each of these, instantly and had been capable of stabilize our community,” and is now performing a root trigger evaluation.

Duffy has repeatedly insisted, at a number of press conferences, that Congress wants to supply extra funding for aviation tools upgrades. Requested why the upgrades had been made at 3pm on a Friday afternoon — quite than, say, at midnight on a Saturday — he responded that whereas “switchovers” at greater airports will happen late at evening, distant switchovers occur in the course of the day.

“There will likely be reevaluation of after we do that work,” he mentioned.

This was solely the third nationwide floor cease of the twenty first century. Greater than 8,200 flights had been canceled on Friday night, in keeping with aviation information agency Cirium. And the results continued after the bottom cease was lifted, with at the least one other 3,000 flights canceled on Saturday.

The bottom cease got here only a day after the FAA introduced the rollout of an AI instrument for air site visitors controllers; the air site visitors controllers union mentioned it was not consulted in designing the system. Nevertheless, FAA administrator Bryan Bedford mentioned the company sees “zero proof of something nefarious and nil proof of something AI-related.”

“We wish to be clear that now we have an tools challenge, and we’re working by what this faulty piece of apparatus was,” Bedford mentioned.

When Homeland Safety Secretary Markwayne Mullin was requested earlier if the bottom cease was attributable to AI, he replied, “We name it SI round right here, keep in mind? SI.”