MCDERMOTT INTERNATIONAL INC
SC 13D/A, 1997-04-08
ENGINES & TURBINES
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<PAGE>
                                 UNITED STATES

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                 SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                               (Amendment No. 1)

                         McDERMOTT INTERNATIONAL, INC.

                               (Name of Issuer)

                         Common Stock, $1.00 Par Value

                        (Title of Class of Securities)

                                   580037109

                                (CUSIP Number)

                          Christopher E. Manno, Esq.
                           Willkie Farr & Gallagher
                             153 East 53rd Street
                           New York, New York 10022
                                (212) 821-8000

                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)

                                 April 1, 1997

                     (Date of Event which Requires Filing
                              of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box |_|.

Check the following box if a fee is being paid with the statement |_|.*

Note: Six copies of this  statement,  including all exhibits,  should be filed
with the  Commission.  See Rule 13d-1(a) for other parties to whom copies are
to be sent.

- ----------------------------

*A filing fee is not being paid with this statement pursuant to SEC Release No.
33-7331 whereby the filing fee has been eliminated for Schedule 13D.

                              Page 1 of 14 Pages


<PAGE>
                                 SCHEDULE 13D



CUSIP No. 580037109

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  Soros Fund Management LLC

2        Check the Appropriate Box If a Member of a Group
                                                     a.  |_|
                                                     b.  |X|

3        SEC Use Only

4        Source of Funds

                  AF

5        Check Box If Disclosure of Legal Proceedings Is Required Pursuant to
         Items 2(d) or 2(e)  |_|

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
 Number of                                  4,208,200
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   4,208,200
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person
                                            4,208,200

12       Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
                           |X|

13       Percent of Class Represented By Amount in Row (11)
                                    7.66%

14       Type of Reporting Person
                  OO, IA



<PAGE>




                                 SCHEDULE 13D

CUSIP No. 580037109

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  George Soros      (in the capacity described herein)

2        Check the Appropriate Box If a Member of a Group
                                                     a.  |_|
                                                     b.  |X|

3        SEC Use Only

4        Source of Funds

                  AF

5        Check Box If Disclosure of Legal Proceedings Is Required Pursuant to
         Items 2(d) or 2(e)  |_|

6        Citizenship or Place of Organization

                  United States

                           7        Sole Voting Power
 Number of                                  0
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  4,208,200
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   0
    With
                           10       Shared Dispositive Power
                                            4,208,200

11       Aggregate Amount Beneficially Owned by Each Reporting Person
                                            4,208,200

12       Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
                           |X|

13       Percent of Class Represented By Amount in Row (11)
                                    7.66%

14       Type of Reporting Person

                  IA



<PAGE>




                                 SCHEDULE 13D

CUSIP No. 580037109

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  Stanley F. Druckenmiller (in the capacity described herein)

2        Check the Appropriate Box If a Member of a Group
                                                     a.  |_|
                                                     b.  |X|

3        SEC Use Only

4        Source of Funds

                  AF

5        Check Box If Disclosure of Legal Proceedings Is Required Pursuant to
         Items 2(d) or 2(e)  |_|

6        Citizenship or Place of Organization

                  United States

                           7        Sole Voting Power
 Number of                                  378,800
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  4,208,200
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   378,800
    With
                           10       Shared Dispositive Power
                                            4,208,200

11       Aggregate Amount Beneficially Owned by Each Reporting Person
                                            4,587,000

12       Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
                           |_|

13       Percent of Class Represented By Amount in Row (11)
                                    8.35%

14       Type of Reporting Person

                  IA



<PAGE>




                                 SCHEDULE 13D

CUSIP No. 580037109

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  Duquesne Capital Management, L.L.C.

2        Check the Appropriate Box If a Member of a Group
                                                     a.  |_|
                                                     b.  |X|

3        SEC Use Only

4        Source of Funds

                  AF

5        Check Box If Disclosure of Legal Proceedings Is Required Pursuant to
         Items 2(d) or 2(e)  |_|

6        Citizenship or Place of Organization

                  Pennsylvania

                           7        Sole Voting Power
 Number of                                  378,800
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   378,800
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            378,800

12       Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
         |X|

13       Percent of Class Represented By Amount in Row (11)

                                    0.69%

14       Type of Reporting Person

                  OO, IA


<PAGE>





Item 1.  Security and Issuer

                  This  Amendment  No. 1 to  Schedule  13D  relates to shares of
Common  Stock,  $1.00 par value per share (the  "Common  Stock"),  of  McDermott
International, Inc., a Panamanian corporation (the "Issuer"). This Amendment No.
1 supplementally  amends the initial  statement on Schedule 13D of the Reporting
Persons dated March 13, 1997 (the "Initial Statement").  The principal executive
offices of the Issuer are located at 1450 Poydras Street, New Orleans, Louisiana
70112-6050.  This Amendment No. 1 is being filed by the Reporting Persons solely
to report the recent  acquisition of certain shares of the Common Stock held for
the  accounts of Quantum  Partners  and the  Duquesne LLC Clients as a result of
which the  percentage of shares of Common Stock of which the Reporting   Persons
may be  deemed to  be the   beneficial owners  has   increased by  more than one
percent.   Capitalized   terms used  herein and  not otherwise   defined  herein
shall have the meanings given to them in the Initial Statement.

Item 3.  Source and Amount of Funds or Other Consideration.

                  Quantum  Partners  expended    approximately  $16,523,894   of
its working   capital to purchase   the Common Stock  which is reported  in Item
5(c) as  having been   purchased for  its account   since March  13, 1997,   the
filing of the Initial Statement.

                  Duquesne  LLC  expended   approximately   $1,855,195   of  the
investment  funds of the Duquesne LLC Clients to purchase the Common Stock which
is reported in Item 5(c) as having been purchased for their accounts since March
13, 1997, the filing of the Initial Statement.

                  The  securities  held for the  accounts  of  Quantum  Partners
and/or the Duquesne LLC Clients may be held through margin  accounts  maintained
with  brokers,  which extend margin credit as and when required to open or carry
positions  in their  margin  accounts,  subject  to  applicable  federal  margin
regulations, stock exchange rules and such firms' credit policies. The positions
which may be held in the margin accounts,  including shares of Common Stock, are
pledged as  collateral  security  for the  repayment  of debit  balances  in the
respective accounts.

Item 5.  Interest in Securities of the Issuer.

                  (a)  (i)  Each of SFM LLC and  Mr.  Soros  may be  deemed  the
beneficial owner of the 4,208,200 shares of Common Stock (approximately 7.66% of
the total number of shares of Common Stock  outstanding) held for the account of
Quantum Partners.

                            (ii)      Mr.   Druckenmiller   may  be  deemed  the
beneficial  owner of  4,587,000  shares of  Common Stock  (approximately   8.35%
of the total  number   of  shares  of   Common Stock outstanding).  This  number
consists  of  (A)  4,208,200  shares  of  Common  Stock  held for the account of
Quantum  Partners and (B) 378,800  shares of Common Stock held for  the accounts
of the Duquesne LLC Clients.

                            (iii)   Duquesne LLC  may be deemed the   beneficial
owner of  the 378,800  shares of  Common Stock  held for  the   accounts of  the
Duquesne  LLC Clients  (approximately   0.69% of the total  number of  shares of
Common  Stock outstanding).

                  (b)       (i)       Pursuant  to the   terms of the   contract
between  Quantum  Fund and SFM LLC,  and as a result of the  positions  held  by
Mr.  Soros and Mr.  Druckenmiller   with SFM LLC, SFM LLC may be deemed  to have
sole power and Mr.  Soros and Mr.  Druckenmiller  may be deemed to have   shared
power to  direct   the voting   and   disposition   of the  4,208,200 shares  of
Common Stock held for the account of Quantum Partners.

                            (ii)      As  a  result  of  the  contracts  between
Duquesne LLC  and the  Duquesne LLC  Clients,   and as  a result of the position
held by Mr.   Druckenmiller  with  Duquesne LLC, each  of Duquesne   LLC and Mr.
<PAGE>
Druckenmiller  may be  deemed  to have the sole  power to direct the voting  and
disposition of  the 378,800  shares of  Common Stock  held for  the accounts  of
Duquesne LLC Clients.

                   (c)   Except   for  the   transactions   listed  in  Annex  C
hereto, there have been no  transactions   effected  with respect to the  shares
of Common  Stock since  March 13,  1997, the  date of  the filing of the Initial
Statement,  by any of the  Reporting Persons,  Quantum Partners or  the Duquesne
LLC Clients. All of the   transactions  listed  in   Annex C were  executed   in
routine  brokerage transactions on the New York Stock Exchange.

                   (d) (i)  The  shareholders  of  Quantum  Partners,  including
Quantum Fund, have the right to participate in the receipt of dividends from, or
proceeds from the sale of,  securities,  including shares of Common Stock,  held
for the account of Quantum Partners in accordance with their ownership interests
in Quantum Partners.

                           (ii)     The   Duquesne  LLC Clients  have the  right
to  participate  in the receipt of dividends from,  or  proceeds  from the  sale
of,  securities  (including  shares of Common Stock) held for their accounts  in
accordance with their advisory  contracts with Duquesne LLC.

                   (e)     Not applicable.

                  Each of SFM LLC and Mr. Soros expressly  disclaims  beneficial
ownership  of any shares of Common  Stock not held  directly for the accounts of
the SFM Clients.  Duquesne LLC expressly disclaims  beneficial  ownership of any
shares of Common  Stock not held  directly  for the accounts of the Duquesne LLC
Clients.

Item 7.           Material to be Filed as Exhibits.

                  A.         Power  of   Attorney   dated as  of January 1, 1997
granted  by Mr.  Soros in favor of Mr.  Sean C.  Warren and Mr. Michael C.  Neus
(filed  as  Exhibit  A  to  the  Initial  Statement  and  incorporated herein by
reference).

                  B.           Power  of  Attorney  dated  as of January 1, 1997
granted by Mr.  Druckenmiller in favor of Mr. Sean C. Warren and Mr. Michael  C.
Neus (filed as Exhibit B to the Initial Statement and incorporated herein by
reference).

                  C.        Joint Filing Agreement dated  March 13, 1997 by  and
among  SFM  LLC,  Mr.  Soros,   Mr.   Druckenmiller  and  Duquesne LLC (filed as
Exhibit C to the Initial Statement and incorporated herein by reference).





<PAGE>




                                  SIGNATURES

         After  reasonable  inquiry and to the best of my knowledge  and
belief, the  undersigned  certifies that the  information set forth in this
statement is true, complete and correct.

Date:  April 7, 1997                        SOROS FUND MANAGEMENT LLC


                                            By: /s/ Michael C. Neus
                                                Michael C. Neus
                                                Assistant General Counsel


                                            GEORGE SOROS


                                            By: /s/ Michael C. Neus
                                                Michael C. Neus
                                                Attorney-in-Fact


                                            STANLEY F. DRUCKENMILLER


                                            By: /s/ Michael C. Neus
                                                Michael C. Neus
                                                Attorney-in-Fact


                                            DUQUESNE CAPITAL MANAGEMENT, L.L.C.


                                            By: /s/ Gerald Kerner
                                                Gerald Kerner
                                                Managing Director






<PAGE>




                                    ANNEX C

   Recent Transactions in the Common Stock of McDermott International, Inc.

<TABLE>
<CAPTION>


  For the Account of                 Date of Transaction   Nature of Transaction   Number of Shares       Price Per Share
                                           <S>                   <C>                     <C>                  <C>
QUANTUM PARTNERS LDC(1)                    03/13/97              Purchase                5,000                22.167
                                           03/13/97              Purchase                8,000                21.810
                                           03/13/97              Purchase               27,000                21.810
                                           03/13/97              Purchase               18,800                21.810
                                           03/13/97              Purchase               43,200                21.560
                                           03/19/97              Purchase               52,200                21.991
                                           03/19/97              Purchase                9,000                22.020
                                           03/20/97              Purchase               57,800                21.806
                                           03/21/97              Purchase               22,100                22.060
                                           03/24/97              Purchase               23,900                22.060
                                           03/25/97              Purchase               66,100                22.034
                                           03/26/97              Purchase               45,000                21.935
                                           03/26/97              Purchase               23,500                22.014
                                           03/26/97              Purchase               22,500                22.045
                                           03/27/97              Purchase               18,000                21.935
                                           03/27/97              Purchase                9,000                21.935
                                           03/27/97              Purchase                4,500                21.645
                                           03/31/97              Purchase               18,000                21.372
                                           03/31/97              Purchase               18,200                21.264
                                           04/01/97              Purchase               25,900                21.008
                                           04/01/97              Purchase                1,700                20.935
                                           04/01/97              Purchase               10,400                21.060
                                           04/02/97              Purchase                5,900                20.800
                                           04/02/97              Purchase               27,000                21.035
                                           04/02/97              Purchase               83,200                20.810
                                           04/03/97              Purchase                5,100                20.310

</TABLE>

(1)  Transactions effected at the direction of SFM LLC.

<PAGE>

<TABLE>
<CAPTION>


  For the Account of                 Date of Transaction   Nature of Transaction   Number of Shares       Price Per Share
                                           <S>                   <C>                     <C>                  <C>
QUANTUM PARTNERS LDC(1)                    04/03/97              Purchase               11,700                20.438
                                           04/04/97              Purchase               14,300                20.114
                                           04/04/94              Purchase               31,500                20.175
                                           04/07/97              Purchase               45,000                20.332
                                           04/07/97              Purchase               18,000                20.403

</TABLE>

(1)  Transactions effected at the direction of SFM LLC.
<PAGE>






<TABLE>
<CAPTION>


  For the Account of                 Date of Transaction   Nature of Transaction   Number of Shares       Price Per Share
                                           <S>                   <C>                     <C>                  <C>
DUQUESNE LLC CLIENTS(2)                    03/13/97              Purchase                1,600                21.500
                                           03/13/97              Purchase                  700                21.750
                                           03/13/97              Purchase                1,000                21.750
                                           03/13/97              Purchase                  700                21.750
                                           03/13/97              Purchase                  200                22.148
                                           03/13/97              Purchase                  400                21.500
                                           03/13/97              Purchase                  200                21.750
                                           03/13/97              Purchase                  200                21.750
                                           03/13/97              Purchase                  100                21.750
                                           03/13/97              Purchase                2,800                21.500
                                           03/13/97              Purchase                1,200                21.750
                                           03/13/97              Purchase                1,800                21.750
                                           03/13/97              Purchase                1,200                21.750
                                           03/13/97              Purchase                  300                22.148
                                           03/19/97              Purchase                  300                22.000
                                           03/19/97              Purchase                1,900                21.931
                                           03/19/97              Purchase                  100                22.000
                                           03/19/97              Purchase                  400                21.931
                                           03/19/97              Purchase                  600                22.000
                                           03/19/97              Purchase                3,500                22.931
                                           03/20/97              Purchase                2,100                21.746
                                           03/20/97              Purchase                  500                21.746
                                           03/20/97              Purchase                3,800                21.746
                                           03/21/97              Purchase                  800                22.000
                                           03/21/97              Purchase                  200                22.000
                                           03/21/97              Purchase                1,400                22.000
                                           03/24/97              Purchase                  900                22.000

</TABLE>

(2)  Transactions effected at the direction of Duquesne LLC.


<PAGE>


<TABLE>
<CAPTION>


  For the Account of                 Date of Transaction   Nature of Transaction   Number of Shares       Price Per Share
                                           <S>                   <C>                     <C>                  <C>
DUQUESNE LLC CLIENTS(2)                    03/24/97              Purchase                  200                22.000
                                           03/24/97              Purchase                1,500                22.000
                                           03/25/97              Purchase                2,400                21.974
                                           03/25/97              Purchase                  600                21.974
                                           03/25/97              Purchase                4,400                21.974
                                           03/26/97              Purchase                  800                21.985
                                           03/26/97              Purchase                  900                21.995
                                           03/26/97              Purchase                1,600                21.875
                                           03/26/97              Purchase                  200                21.985
                                           03/26/97              Purchase                  200                21.995
                                           03/26/97              Purchase                  400                21.875
                                           03/26/97              Purchase                1,500                21.985
                                           03/26/97              Purchase                1,500                21.995
                                           03/26/97              Purchase                3,000                21.875
                                           03/27/97              Purchase                  300                21.875
                                           03/27/97              Purchase                  700                21.875
                                           03/27/97              Purchase                  200                21.625
                                           03/27/97              Purchase                  100                21.875
                                           03/27/97              Purchase                  100                21.875
                                           03/27/97              Purchase                  600                21.875
                                           03/27/97              Purchase                1,200                21.875
                                           03/27/97              Purchase                  300                21.625
                                           03/31/97              Purchase                  700                21.244
                                           03/31/97              Purchase                  700                21.312
                                           03/31/97              Purchase                  100                21.244
                                           03/31/97              Purchase                  100                21.312
                                           03/31/97              Purchase                1,200                21.244
                                           03/31/97              Purchase                1,200                21.312

</TABLE>

(2)  Transactions effected at the direction of Duquesne LLC.

<PAGE>
<TABLE>
<CAPTION>


  For the Account of                 Date of Transaction   Nature of Transaction   Number of Shares       Price Per Share
                                           <S>                   <C>                     <C>                  <C>
DUQUESNE LLC CLIENTS(2)                   04/01/97              Purchase                  400                21.000
                                           04/01/97              Purchase                  900                20.989
                                           04/01/97              Purchase                  100                20.875
                                           04/01/97              Purchase                  100                21.000
                                           04/01/97              Purchase                  200                21.989
                                           04/01/97              Purchase                  600                21.000
                                           04/01/97              Purchase                1,700                21.989
                                           04/01/97              Purchase                  100                20.875
                                           04/02/97              Purchase                3,100                20.750
                                           04/02/97              Purchase                  200                20.780
                                           04/02/97              Purchase                1,000                20.975
                                           04/02/97              Purchase                  700                20.750
                                           04/02/97              Purchase                  100                20.780
                                           04/02/97              Purchase                  200                20.975
                                           04/02/97              Purchase                5,500                20.750
                                           04/02/97              Purchase                  400                20.780
                                           04/02/97              Purchase                1,800                20.975
                                           04/03/97              Purchase                  400                20.418
                                           04/03/97              Purchase                  200                20.250
                                           04/03/97              Purchase                  100                20.418
                                           04/03/97              Purchase                  800                20.418
                                           04/03/97              Purchase                  300                20.250
                                           04/04/97              Purchase                1,100                20.116
                                           04/04/97              Purchase                  500                20.094
                                           04/04/97              Purchase                  300                20.116
                                           04/04/97              Purchase                  100                20.094
                                           04/04/97              Purchase                2,100                20.116
                                           04/04/97              Purchase                1,000                20.094
</TABLE>

(2)  Transactions effected at the direction of Duquesne LLC.
<PAGE>
<TABLE>
<CAPTION>


  For the Account of                 Date of Transaction   Nature of Transaction   Number of Shares       Price Per Share
                                           <S>                   <C>                     <C>                  <C>
DUQUESNE LLC CLIENTS(2)                    04/07/97              Purchase                  700                20.343
                                           04/07/97              Purchase                1,600                20.312
                                           04/07/97              Purchase                  300                20.343
                                           04/07/97              Purchase                  100                20.312
                                           04/07/97              Purchase                1,200                20.343
                                           04/07/97              Purchase                3,000                20.312


</TABLE>

(2)  Transactions effected at the direction of Duquesne LLC.



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