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      Federal regulators investigating jet engine issue that sparked fire

      NORTH CHARLESTON, SC (WACH / AP) -- Boeing Co. says federal regulators are investigating after one of its 787 jets had an engine issue that sparked a fire in South Carolina. But the company says it remains confident in its safety.

      The investigation comes after Boeing reported one of its 787s had an engine issue Saturday while undergoing preflight runway testing in North Charleston, S.C. The Post and Courier newspaper of Charleston reported that debris from the aircraft fell on the runway at Charleston International Airport and sparked a fire in the nearby grass, which closed the airport for more than an hour.

      The jet is one of Boeing's most critical products. The Chicago company delivered the first 787, known as the Dreamliner, last year following several years of design and production delays.

      (The AP contributed to this story.)