Raising concerns about the protection of attorney-client privilege, the Association of Corporate Counsel, the U.S. Chamber of Commerce and other business groups this month challenged a federal trial judge’s ruling that contractor Kellogg Brown & Root Services Inc. must hand over documents to a whistleblower’s lawyer.

Lawyers for the business groups are backing KBR in a fight in the U.S. Court of Appeals for the D.C. Circuit over whether the company must produce 89 documents to attorneys for Harry Barko, who is suing the company for alleged violations of the False Claims Act.