In a video, sparks are seen emanating from the plane after takeoff.
A United Airlines flight made an emergency landing at Newark Airport, New Jersey on Thursday.
The Boeing 777-200, ready to take off for Brazil, was already circling over the Atlantic to burn fuel.
The airline said the plane had suffered a mechanical problem, possibly with a hydraulic pump.
A United Airlines flight with 256 passengers was forced to make an emergency landing in Newark Airport.
Aviation publication AeroXplorer published a video filmed by an aviation photographer showing sparks emanating from the plane.
The best way is to fly around a little bit to burn fuel,” said aviation analyst John Nance.
Those passengers on the United Airlines flight worried after they get to know.
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