NEW YORK - PNC Bank NA on Aug. 14 filed a brief in the U.S. Bankruptcy Court for the Southern District of New York objecting to bankrupt Residential Capital LLC's (ResCap) motion seeking approval of a settlement agreement between a putative class of lenders and ResCap that would limit ResCap's liability to $57.6 million (In Re: Residential Capital LLC, No. 12-12020, Chapter 11, S.D. N.Y. Bkcy.).