NEW YORK - The Official Committee of Unsecured Creditors in the Chapter 11 bankruptcy case of AMR Corp., the parent company of American Airlines Inc., on July 22 filed a brief objecting to the proof of claim submitted by some aircraft finance parties on account of tax indemnity agreements (TIA claims) that are valued at $424 million, arguing that the claims should be disallowed (In Re: AMR Corp., No. 11-15463, Chapter 11, S.D. N.Y. Bkcy.).