MORRISON KNUDSEN CORP <MRN> 3RD QTR LOSS Oper shr loss 2.51 dlrs vs profit 94 cts Oper net loss 27.2 mln vs profit 10.3 mln Revs 464.2 mln vs 504.6 mln Nine mths Oper shr loss 1.33 dlrs vs profit 2.57 dlrs Oper net loss 14.4 mln vs profit 28.2 mln Revs 1.41 billion vs 1.55 billion NOTE: 1987 qtr and nine mths excludes loss 41.1 mln dlrs, or 3.79 dlrs per share, and loss 41.8 mln dlrs, or 3.87 dlrs per share, respectively, from discontinued real estate operations. 1986 qtr and nine mths include loss 126,000 dlrs, or one cent per share, and gain 304,000 dlrs, or three cts per share, respectively, from discontinued operations.