A flight returned to Omaha, Nebraska, shortly after takeoff on Monday evening when the pilots mistakenly thought someone might be trying to break into the cockpit.
American Airlines Flight 6469, operated by SkyWest, took off from Eppley Airfield in Omaha at 6:41 p.m. Central time, bound for Los Angeles International Airport.
The cabin crew discovered that there was a problem with the intercom that they use to communicate with one another and the pilots. A member of the crew then knocked on the locked cabin door to tell the pilots, the Federal Aviation Administration said.
The pilots had also heard a static sound over the intercom and feared someone might be trying to break into the cockpit, an American Airlines representative told The Associated Press.
It turned out that the pilots hea