"After landing, it was determined there was a problem with the inter-phone system and the flight crew was knocking on the cockpit door," the FAA said.

A plane carrying passengers from Omaha, Nebraska, to Los Angeles made an emergency landing minutes into the flight “out of an abundance of caution” after pilots mistakenly thought someone was trying ...

In an official statement, the Federal Aviation Administration (FAA) said the communications failure--and ensuing confusion regarding the knocking on the cockpit--led to the emergency.