AMERICAN <AMR> SETS SCHEDULE FOR AIRCAL MERGER AMR Corp's American Airlines unit said it plans to complete the integration of AirCal into its operations within four to five months. American's merger with AirCal, announced last November, received final approval from the Department of Transportation yesterday. American said Richard D. Pearson, coordinator of the airline's merger activities, will become chairman and chief executive officer of AirCal during the period up to completion of the merger. American said Pearson succeeds William Lyon, who has been elected to AMR's board. It added that David A. Banmiller will continue as AirCal's president and chief operating officer.