The Boeing 787, flying from Washington, D.C., to Munich, had to make hasty return to the airport "to address a mechanical issue," the carrier said.

A United Airlines flight traveling from Washington Dulles International Airport made an emergency landing last month after the pilot declared a mayday call shortly after takeoff due to engine failure.

United Flight 108 had just departed for an hours-long flight to Germany, when one of its engines malfunctioned.