Southwest B737 at Orlando on May 2nd 2014, bird strike

A Southwest Airlines Boeing 737-700, registration N280WN performing flight WN-3590 from Orlando,FL to Philadelphia,PA (USA), was accelerating for takeoff from Orlando's runway 35L when the left hand engine ingested a large bird just prior to rotation. The crew continued takeoff and climbed the aircraft to 5000 feet. The left hand engine was reduced to idle thrust due to vibrations and was kept running at idle thrust. The aircraft returned to Orlando for a safe landing on runway 35R about 20 minutes after departure.

The FAA reported the left hand engine ingested a large bird during departure, suffered vibrations and was left at idle.