U.S. Air Travel Disruptions Continue Into Third Day

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The FAA issued a nationwide ground stop on Friday that halted nearly all departing flights for almost five hours.

NEW YORK, Nov 15 (Reuters) - US air travel disruptions continued for a third day with more than 5,200 flights already affected on Sunday, but Transportation Secretary Sean Duffy predicted a return to normalcy by Monday even as airlines scrambled to get back on schedule following a systemwide ground stop.

More than 1,600 flights nationwide were canceled and almost 3,600 were delayed on Sunday, according to aviation data site FlightAware. Airlines on Saturday had canceled more than 6,400 US flights and delayed more than 8,000.

Duffy said on ABC’s “This Week” program there is no evidence of a cyberattack or other malicious intent in the matter, but the cause remained unclear. Duffy said that flights will come “back to normal” on Sunday “but probably fully normal” on Monday, and emphasized the Federal Aviation Administration’s focus on keeping passengers safe.

On Sunday, 27% of JetBlue JBLU.O flights and 13% of American Airlines AAL.O flights were canceled, with Southwest, United Airlines UAL.O and Delta DAL.N reporting cancellations of 3% to 5% of their flights.

The FAA issued a nationwide ground stop on Friday that halted nearly all departing flights for almost five hours. It was the longest nationwide halt to US air travel since the September 11, 2001, al Qaeda attacks on the United States.

The installation by FAA contractor L3Harris LHX.N of at least one new router at a remote facility led to a situation in which other air traffic control centers were overloaded with a flood of data that hampered communications systems, according to officials.

Duffy said on Sunday that the replacement of a router at an FAA facility in El Dorado, Arkansas, triggered problems with a recently replaced router in Amarillo, Texas, which started broadcasting and overloading routers at other air traffic control centers across the country.

The “functionality of the originating routers” has been disabled, the FAA said on Sunday, adding that it did the same for about 60 similar routers in the air…

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