According to details provided by the New York Post, the female passenger crossed the barrier in an unmanned area of the Transportation Security Administration (TSA) screening line at Nashville International Airport. Here passengers have to show their identity. The airport authorities have started an investigation.

It was confirmed that the passenger and her carry-on baggage were checked at the Nashville International Airport security checkpoint on February 7 before boarding the flight. American Airlines has admitted its mistake in this case. Five hours later she realized that she had traveled without a ticket. The FBI detained the female passenger on American Airlines Flight 1393 on February 7 and began an investigation immediately after she arrived at Los Angeles International Airport. The agency said that no case has been registered against her and the investigation is ongoing.