Friday was another long day for passengers using American Airlines.The airline canceled 595 of its flights so it could inspect the wiring on its MD-80 aircraft. More than 900 flights were canceled on Thursday and there have been nearly 3,100 cancellations for the week.The carrier said at least 250,000 passengers have been affected by the cancellations and that the disruptions will cost millions of dollars. A spokeswoman for the airline says things are expected to be back to normal by Saturday night.American Airlines has said it is trying to accommodate those that are affected by the cancellations.

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