WASHINGTON, March 14 (Reuters) - AMR Corp. (AMR), the parent company of American Airlines Inc., on Thursday filed with the U.S. Securities and Exchange Commission to periodically sell up to $1.9 billion in debt securities. A shelf registration filed with the SEC also carries forward $650 million of previously registered but unsold debt securities, the Fort Worth, Texas-based company said. The proceeds from the shelf offering will be used for American's working capital and general corporate purposes, including debt repayment or lease obligations, buying aircraft and other capital spending, according to the prospectus. AMR shares were down 51 cents, or 1.9 percent, at $27.03 in late morning New York Stock Exchange trading. ©2002 Reuters Limited.