SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6 )* PETROLEUM HELICOPTERS INCORPORATED -------------------------------------------------------------------------------- (Name of Issuer) VOTING COMMON STOCK -------------------------------------------------------------------------------- (Title of Class of Securities) 716604 10 3 -------------------------------------------------------------------------------- (CUSIP Number) DECEMBER 31, 2004 -------------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [ ] Rule 13d-1(b) [X] Rule 13d-1(c) [ ] Rule 13d-1(d) * The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). -------------------------------------------------------------------------------- CUSIP No. 716604 10 3 13G Page 2 of 7 Pages -------------------------------------------------------------------------------- 1 Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons (entities only) WOODBOURNE PARTNERS, L.P. -------------------------------------------------------------------------------- 2 Check the Appropriate Box if a Member of a Group (See Instructions) (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3 SEC Use Only -------------------------------------------------------------------------------- 4 Citizenship or Place of Organization MISSOURI -------------------------------------------------------------------------------- 5 Sole Voting Power -0- -------------------------------------------------------------- Number of 6 Shared Voting Power Shares Beneficially -0- Owned by -------------------------------------------------------------- Each 7 Sole Dispositive Power Reporting Person With -0- -------------------------------------------------------------- 8 Shared Dispositive Power -0- -------------------------------------------------------------------------------- 9 Aggregate Amount Beneficially Owned by Each Reporting Person 233,300 -------------------------------------------------------------------------------- 10 Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] -------------------------------------------------------------------------------- 11 Percent of Class Represented by Amount in Row (9) 8.2% -------------------------------------------------------------------------------- 12 Type of Reporting Person (See Instructions) PN -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- CUSIP No. 716604 10 3 13G Page 3 of 7 Pages -------------------------------------------------------------------------------- 1 Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons (entities only) CLAYTON MANAGEMENT COMPANY -------------------------------------------------------------------------------- 2 Check the Appropriate Box if a Member of a Group (See Instructions) (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3 SEC Use Only -------------------------------------------------------------------------------- 4 Citizenship or Place of Organization MISSOURI -------------------------------------------------------------------------------- 5 Sole Voting Power 233,300 -------------------------------------------------------------- Number of 6 Shared Voting Power Shares Beneficially -0- Owned by -------------------------------------------------------------- Each 7 Sole Dispositive Power Reporting Person With 233,300 -------------------------------------------------------------- 8 Shared Dispositive Power -0- -------------------------------------------------------------------------------- 9 Aggregate Amount Beneficially Owned by Each Reporting Person 233,300 -------------------------------------------------------------------------------- 10 Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] -------------------------------------------------------------------------------- 11 Percent of Class Represented by Amount in Row (9) 8.2% -------------------------------------------------------------------------------- 12 Type of Reporting Person (See Instructions) CO -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- CUSIP No. 716604 10 3 13G Page 4 of 7 Pages -------------------------------------------------------------------------------- 1 Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons (entities only) JOHN D. WEIL -------------------------------------------------------------------------------- 2 Check the Appropriate Box if a Member of a Group (See Instructions) (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3 SEC Use Only -------------------------------------------------------------------------------- 4 Citizenship or Place of Organization MISSOURI -------------------------------------------------------------------------------- 5 Sole Voting Power 233,300 -------------------------------------------------------------- Number of 6 Shared Voting Power Shares Beneficially -0- Owned by -------------------------------------------------------------- Each 7 Sole Dispositive Power Reporting Person With 233,300 -------------------------------------------------------------- 8 Shared Dispositive Power -0- -------------------------------------------------------------------------------- 9 Aggregate Amount Beneficially Owned by Each Reporting Person 233,300 -------------------------------------------------------------------------------- 10 Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] -------------------------------------------------------------------------------- 11 Percent of Class Represented by Amount in Row (9) 8.2% -------------------------------------------------------------------------------- 12 Type of Reporting Person (See Instructions) IN -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- CUSIP No. 716604 10 3 13G Page 5 of 7 Pages -------------------------------------------------------------------------------- AMENDMENT NO. 3 TO SCHEDULE 13G The Reporting Person reported the acquisition of shares of Voting Common Stock ("Stock") of Petroleum Helicopters Incorporated, a Delaware corporation ("Issuer"), 113 Borman Drive, P.O. Box 23502, Lafayette, LA 70508, in an initial filing of this Schedule 13G on February 16, 1999. In this regard, Item 4 (as heretofore amended) is hereby amended as follows. All other items are unchanged from the initial filing, as amended. ITEM 4. Ownership. WEIL CLAYTON (sole director and (general partner shareholder of WOODBOURNE of Woodbourne) Clayton) ---------- ---------------- ------------------ (a) Amount beneficially owned: 233,300 233,300 233,300 (b) Percent of Class: 8.2% 8.2% 8.2% (c) Number of Shares as to which the person has: (i) Sole power to vote or direct the vote: -0- 233,300 233,300 (ii) Shared power to vote or direct the vote: -0- -0- -0- (iii) Sole power to dispose or to direct the disposition of: -0- 233,300 233,300 (iv) Shared power to dispose or to direct the disposition of: -0- -0- -0- Percentage figures are based on 2,852,616 shares outstanding as of October 31, 2004 based on the company's most recent 10-Q filing with the SEC. -------------------------------------------------------------------------------- CUSIP No. 716604 10 3 13G Page 6 of 7 Pages -------------------------------------------------------------------------------- ITEM 10. Certification. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. Dated: February 10, 2005 WOODBOURNE PARTNERS, L.P., by its General Partner, CLAYTON MANAGEMENT COMPANY /s/ John D. Weil ----------------------- John D. Weil, President Dated: February 10, 2005 CLAYTON MANAGEMENT COMPANY /s/ John D. Weil ----------------------- John D. Weil, President Dated: February 10, 2005 /s/ John D. Weil ------------------------ John D. Weil -------------------------------------------------------------------------------- CUSIP No. 716604 10 3 13G Page 7 of 7 Pages -------------------------------------------------------------------------------- EXHIBIT A TO SCHEDULE 13G AGREEMENT PURSUANT TO RULE 13d-1(k)(1) The undersigned persons, on February 10, 2005, agree and consent to the joint filing on their behalf of this Amendment No. 4 to Schedule 13G in connection with their beneficial ownership of the voting common stock of Petroleum Helicopters Incorporated. WOODBOURNE PARTNERS, L.P., by its General Partner, CLAYTON MANAGEMENT COMPANY /s/ John D. Weil ----------------------- John D. Weil, President CLAYTON MANAGEMENT COMPANY /s/ John D. Weil ----------------------- John D. Weil, President /s/ John D. Weil ----------------------- John D. Weil