Delta Air Lines passengers stand in line after flights resumed Monday in Salt Lake City, following a computer outage. (AP Photo/Rick Bowmer)

Delta cancels more flights in wake of computer-system outage

By DAVID KOENIG, Associated Press

DALLAS — Travelers on Delta Air Lines endured hundreds more canceled and delayed flights on Tuesday as the carrier slogged through day two of its recovery from a global computer outage.

By early afternoon, Delta said it had canceled about 530 flights as it moved planes and crews to “reset” its operation.

Nearly 1,200 Delta flights had been delayed, according to tracking service FlightStats Inc.

“We are still operating in recovery mode,” said Dave Holtz, the airline’s senior vice president of operations.

Tuesday’s disruptions followed about 1,000 cancelations and 2,800 delayed flights on Monday after a power outage at Delta’s Atlanta headquarters tripped a meltdown of its booking, communications and other systems.

The airline was back online after a few hours Monday, but the ripple effects could be felt a day later.

More than 1,000 people spent the night at Narita Airport outside Tokyo because of the shutdown. While flights resumed in the morning, Delta spokeswoman Hiroko Okada said more delays were expected.

Delta also extended a travel-waiver policy to help stranded passengers rearrange their travel plans.

The airline posted a video apology by CEO Ed Bastian. And it offered refunds and $200 in travel vouchers to people whose flights were canceled or delayed at least three hours.

Delta’s challenge Tuesday will be to find enough seats on planes during the busy summer vacation season to accommodate the tens of thousands of passengers whose flights were scrubbed.

Airlines have been putting more people in each plane, so when a system of a major carrier crashes, as has happened with others before Delta, finding a new seat for the waylaid becomes more difficult.

Last month, the average Delta flight was 87 percent full.

Confusion among passengers Monday was compounded as Delta’s flight-status updates crashed as well. Instead of staying home or poolside at a hotel until the airline could fix the mess, many passengers learned about the gridlock only after they reached the airport.

They were stuck.

Delta spokesman Trebor Banstetter said that after the power outage, key systems and network equipment did not switch over to backups. The investigation of the outage is ongoing, but Banstetter said that there is no indication that the problems were caused by a hack or intentional breach of the system.

A spokesman for the local electric company, Georgia Power, said the problem started with a piece of Delta equipment called a switchgear, which direct flows within a power system. No other customers lost power, he said.

Airlines depend on huge, overlapping and complicated systems to operate flights, ticketing, boarding, airport kiosks, websites and mobile phone apps. Even brief outages can now snarl traffic and, as the Delta incident shows, those problems can go global in seconds.

Last month, Southwest Airlines canceled more than 2,000 flights over four days after an outage that it blamed on a faulty network router. United Airlines and American Airlines both suffered outages last year — United has struggled with several meltdowns since combining technology systems with merger partner Continental Airlines.

Some passengers said they were shocked that computer glitches could cause such turmoil. Others took it in stride.

Ryan Shannon, whose flight from Lexington, Kentucky, on Monday was delayed, said passengers boarded, were told to exit, waited about 90 minutes, then got back on the plane and flew to New York without further incident.

“There is always a delay, or weather, or something,” he said. “I travel weekly, so I’m used to it.”

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