Bankruptcy Judge Sean Lane will hold a hearing to review AMR Corp.'s planned merger with US Airways Group Inc. on March 27, while the court's assessment of a contentious plan for AMR's commuter-airline unit has been pushed back two weeks to March 12, the Wall Street Journal reported today. The parent of American Airlines asked Judge Lane for a hearing on the merger in a court document filed yesterday, requesting that any objections be filed by March 15, and the judge acceded to the request.