In 2009, a Continental Connection flight run by Colgan Air crashed into a home outside of Buffalo, New York. The following investigation and revelations from the crash has led to a decade-long span without a crash involving a U.S. airline. Rules made after the Colgan Air crash only apply to passenger planes though. But with the recent crash of an Amazon Air cargo in Houston, that might come under more scrutiny. Though it's still early in the investigation, Atlas Air, the company who hired the pilots involved in the crash, has recently been accused of overworking its pilots by one of its employees, according to a Business Insider story. Atlas Air did not immediately return a request for comment from CNBC.