<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 10-K FILING
FOR YEAR ENDED 3/31/98 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   YEAR                   YEAR
<FISCAL-YEAR-END>                          MAR-31-1998             MAR-31-1997
<PERIOD-START>                             APR-01-1997             APR-01-1996
<PERIOD-END>                               MAR-31-1998             MAR-31-1997
<CASH>                                          68,960                 122,491
<SECURITIES>                                         0                       0
<RECEIVABLES>                                  209,915                 190,675
<ALLOWANCES>                                       177                     107
<INVENTORY>                                     49,072                  68,125
<CURRENT-ASSETS>                               373,030                 427,257
<PP&E>                                         520,348                 520,718
<DEPRECIATION>                                 187,167                 162,615
<TOTAL-ASSETS>                                 932,180               1,000,588
<CURRENT-LIABILITIES>                          277,402                 319,066
<BONDS>                                        180,810                 237,071
<PREFERRED-MANDATORY>                           44,979                       0
<PREFERRED>                                          0                       0
<COMMON>                                           121                     131
<OTHER-SE>                                     220,654                 218,661
<TOTAL-LIABILITY-AND-EQUITY>                   932,180               1,000,588
<SALES>                                      1,075,506               1,089,397
<TOTAL-REVENUES>                             1,075,506               1,089,397
<CGS>                                          881,237                 925,137
<TOTAL-COSTS>                                  881,237                 925,137
<OTHER-EXPENSES>                                12,447                  16,207
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                              27,621                  35,102
<INCOME-PRETAX>                                 67,958                  36,659
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                             67,958                  36,659
<DISCONTINUED>                                     225                  22,500
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    68,183                  59,159
<EPS-PRIMARY>                                     5.23                    4.55
<EPS-DILUTED>                                     5.10                    4.41