ROWAN COS INC <RDC> 1ST QTR LOSS Shr loss 36 cts vs loss 11 cts Net loss 18.6 mln vs loss 5,855,000 Revs 23.9 mln vs 53.9 mln NOTE: Net includes tax credits of 12.2 mln dlrs vs 8,510,000 dlrs.