nprnews_____ = ||| lubuntu at wor2 1TXN|||United Grounds 777 Jets After Engine Failure||| kickerpage = |||no kicker pagenpr for NPRNEWS||| summarynpr = |||Federal aviation regulators have called for investigations into Boeing 777 jets equipped with certain Pratt & Whitney 4000 engines.

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Pieces of the airplane engine from United Airlines Flight 328 sit scattered in a neighborhood after the jet’s engine failure on Feb, 20 in Colorado. An engine on the Boeing 777 exploded after takeoff from Denver.

Michael Ciaglo/Getty Images

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Michael Ciaglo/Getty Images

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United Grounds 777 Jets After Engine Failure

Federal aviation regulators have called for investigations into Boeing 777 jets equipped with certain Pratt & Whitney 4000 engines.

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