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A US Airways Express flight has made an emergency landing at Philadelphia International Airport after passengers saw fiery flashes from one of the engines as the plane took off.

The flight bound for Manchester, New Hampshire, quickly returned to the airport Monday morning before 75 passengers and crew boarded another plane and continued on.

People on the ground and aboard the plane heard a loud boom and saw flames shooting out, WPVI-TV in Philadelphia reports.

Passenger Elsa Head told the station that she was terrified, but the crew remained calm.

The plane being operated by Republic Airlines was able to return to the terminal on its own.

(AP)