Law firm files papers in advance of suit over Malaysia plane

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Chicago • Court documents that often precede a lawsuit have been filed by a U.S. law firm on behalf of a relative of a passenger on missing Malaysia Airlines Flight 370.

The filing in Chicago asks a judge to order Malaysia Airlines and Chicago-based Boeing Co. to turn over documents related to the possibility "negligence" caused the Boeing 777 to crash, including any documentation about the chances of "fatal depressurization" in the cockpit.

Chicago-based law firm Ribbeck Law Chartered filed documents meant to preserve evidence Tuesday in Cook County Circuit Court.

They were filed on behalf of Januari Siregar, a relative of Indonesian-born passenger Firman Chandra Siregar. The filings were not clear about their exact relationship.

Boeing spokesman John Dern declined comment. Phone and email messages were left for airline officials Wednesday.