Rockwell International Corp. and two former executives...

Rockwell International Corp. and two former executives have pleaded innocent to federal charges accusing the aerospace contractor of overbilling the Air Force by $450,000. The pleas were entered in a hearing before U.S. District Judge Consuelo B. Marshall, who set trial for Oct. 11. A seven-count indictment filed earlier this month names Rockwell and two former managers at the Seal Beach Satellite Systems division, Donald H. Carter, 59, and Robert Zavodnik, 46, with overbilling on a navigation system contract.