NEW YORK - Bankrupt Hawker Beechcraft Inc. on Dec. 4 filed a brief in the U.S. Bankruptcy Court for the Southern District of New York objecting to a $2.2 billion claim filed by two employees of a subcontractor the company used to manufacture airplane parts, on grounds that they have not met their burden of proof (In Re: Hawker Beechcraft Inc., No. 12-11873, Chapter 11, S.D. N.Y. Bkcy.).