India, July 30 -- A Boeing 787-8 Dreamliner, operated by United Airlines, experienced a mid-air scare in the US last week owing to a critical engine failure, media reports said.

The Munich-bound United Airlines Flight UA108 was flying out of Washington Dulles Airport on its scheduled transatlantic journey on July 25, when its left engine failed.

The incident prompted the crew to declare a "MAYDAY".

The crew declared an emergency soon and worked closely with air traffic controllers to ensure a safe emergency landing.

During this time, the United Airlines pilots requested air traffic controllers (ATC) for fuel dumping while maintaining an altitude of 6,000 feet to manage the plane's weight and entered a holding pattern northwest of Wash...