During the final six months before its dissolution, Dewey & LeBoeuf billed $4.6 million in fees and expenses for work as special counsel to bankrupt American Airlines parent company AMR Corporation. Now, AMR attorneys are trying to trim $644,000 off that bill, citing what they view as unnecessary diligence completed by a partner as he prepared to leave then-floundering Dewey, as well as overpriced FedEx bills and charges for first-year associates prohibited by a contract covering the assignment.

In an eight-page objection filed Thursday in Southern District Bankruptcy Court in New York, AMR lays out the allegedly extraneous charges submitted by Dewey, which represented the airline in several litigation and antitrust matters unrelated to the bankruptcy.