NEW YORK - The class action plaintiffs that sued bankrupt AMR Corp., the parent company of American Airlines, on Dec. 4 filed a brief in the U.S. Bankruptcy Court for the Southern District of New York arguing that the Bankruptcy Court should stay its decision approving the merger of American Airlines and US Airways Group Inc. pending appeal (Carolyn Fjord, et al. v. AMR Corporation, et al. $(In Re: AMR Corporation$), no. 11-15463, Adv. No. 13-01392, Chapter 11, S.D. N.Y. Bkcy.).