The Transportation Department ordered hearings on the proposed merger of TWA and Ozark Airlines . . . Texas Air officials reported the acquisition of 51% of the outstanding common shares of Eastern Airlines . . . Wickes Cos. completed the previously announced sale of its Red Owl stores to a management group of the Minnesota chain, and the sale of Western Diversified Services to Aristar, a unit of Los Angeles-based Great Western Financial . . . Warnaco said it will be able to increase the cash portion of its proposed $45-a-share recapitalization offer to $25 from $10 because investors have been found for notes that the company plans to issue.