The Federal Aviation Administration has accused American Airlines of safety and drug-testing violations.
The agency says the Texas-based airline returned two aircraft into service after pilots reported safety problems. The FAA says two MD-83 airliners were flown 58 times in violation of federal safety regulations.
The FAA also cited the airline for deficiencies in its drug and alcohol testing programs.
The agency is seeking more than $7 million in penalties from the airline.