MINNEAPOLIS (WCCO) — Delta Airlines received the biggest fine ever given to an airline for non-safety violations.

The company was fined $2 million by the U.S. Department of Transportation.

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The DOT handed down the fine saying the airline violated federal rules on passengers with disabilities.

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They found that Delta failed to provide assistance to passengers while getting on and off the planes. They also say Delta didn’t respond adequately enough to disability complaints from passengers.

Of the whole fine, $750,000 must be paid by the airline and as much as $1,250,000 can be used to improve service to passengers with disabilities beyond what is required.

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In a statement Delta said, “We take the responsibility of serving customers with disabilities seriously and have made significant investments in technology, feedback assessment, and training since the issues in 2007 and 2008 that the DOT cites in its consent order.”