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CHICAGO (AP) - A judge has dismissed civil action by a Chicago law firm and scolded attorneys for what she describes as an improper filing on behalf of a relative of a passenger on missing Malaysia Airlines Flight 370.

In a step toward a full-fledged lawsuit, Ribbeck Law Chartered asked a Cook County court last week to order Malaysia Airlines and Chicago-based Boeing Co. to turn over documents related to the plane's disappearance.

Judge Kathy Flanagan dismissed the request in a ruling Friday, saying it didn't conform to Illinois law.

She has tossed similar filings by Ribbeck in two other airplane crashes and warned the firm it could face "sanctions" if it happens again.

Ribbeck spokesman Mervin Mateo says the firm still planned a full lawsuit if and when plane wreckage is found.

(Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)

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