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

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

A United Airlines flight bound for Munich was forced to return to Washington Dulles Airport after its left engine failed shortly after takeoff on 25 July. The pilot declared a mayday and circled to dump fuel before safely landing around 8.