US airlines said they expect operations to return to normal as of Thursday, while the Federal Aviation Administration is stepping up efforts to find the cause of an electronic outage that grounded flights and prevent it from recurring.
More than 11,300 US flights were delayed or canceled on Wednesday, according to the FlightAware website. This is the first nationwide grounding of flights in nearly 20 years.
Major airlines in the United States, including Delta Air Lines, United Airlines and Southwest Airlines, said they expect operations to return to normal on Thursday, Reuters reported.
The electronic failure in the Federal Aviation Administration prevented airports from issuing updated safety warnings that alert pilots of potential dangers such as runway closures, equipment failures or construction work, which led to the temporary suspension of flights.
Federal administration officials said an initial review of the incident found a corrupt file in the database, but added that there was no evidence of a cyberattack and investigations were continuing.
People familiar with the review, who asked not to be identified, said this same file crashed both the primary and backup systems.
