SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Amendment No. 4 Autoclave Engineers, Inc. ______________________________________________________________________________ (Name of Issuer) Common ______________________________________________________________________________ (Title of Class of Securities) 052760105 ______________________________________________________________________________ (CUSIP Number) Check the following box if a fee is being paid with this statement CUSIP No. 1) Names of Reporting Persons S.S. or I.R.S. Identification Nos. of above persons PNC Bank Corp. 25-143-5979 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 Pennsvlvania Number of Shares 5) Sole Voting Power 269,448 Beneficially Owned By Each Reporting Person With 6) Shared Voting Power 0 7) Sole Dispositive Power 28,945 8) Shared Dispositive Power 0 9) Aggregate Amount Beneficially Owned by Each Reporting Person 269,448 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) 11) Percent of Class Represented by Amount in Row (9) 6.39 12) Type of Reporting Person (See Instructions) HC SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Amendment No. 4 Autoclave Engineers, Inc. ______________________________________________________________________________ (Name of Issuer) Common ______________________________________________________________________________ (Title of Class of Securities) 052760105 ______________________________________________________________________________ (CUSIP Number) Check the following box if a fee is being paid with this statement CUSIP No. 1) Names of Reporting Persons S.S. or I.R.S. Identification Nos. of above persons PNC Bancorp, Inc.1 51-0326854 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 Delaware Number of Shares 5) Sole Voting Power 269,448 Beneficially Owned By Each Reporting Person With 6) Shared Voting Power 0 7) Sole Dispositive Power 28,945 8) Shared Dispositive Power 0 9) Aggregate Amount Beneficially Owned by Each Reporting Person 269,448 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) 11) Percent of Class Represented by Amount in Row (9) 6.39 12) Type of Reporting Person (See Instructions) HC 1 PNC Bancorp, Inc. is the direct owner of all the shares of PNC Bank, N.A. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Amendment No. 4 Autoclave Engineers, Inc. ______________________________________________________________________________ (Name of Issuer) Common ______________________________________________________________________________ (Title of Class of Securities) 052760105 ______________________________________________________________________________ (CUSIP Number) Check the following box if a fee is being paid with this statement CUSIP No. 1) Names of Reporting Persons S.S. or I.R.S. Identification Nos. of above persons PNC Bank, Ohio, National Association 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 United States Number of Shares 5) Sole Voting Power 269,448 Beneficially Owned By Each Reporting Person With 6) Shared Voting Power 0 7) Sole Dispositive Power 28,945 8) Shared Dispositive Power 0 9) Aggregate Amount Beneficially Owned by Each Reporting Person 269,448 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) 11) Percent of Class Represented by Amount in Row (9) 6.39 12) Type of Reporting Person (See Instructions) BK Item 4 - Ownership: (a) Amount Beneficially Owned: 269,448 (b) Percent of Class: 6.39 (c) Number of shares to which such person has: (i) sole power to vote or to direct the vote 269,448 (ii) shared power to vote or to direct the vote 0 (iii) sole power to dispose or to direct the disposition of 28,945 (iv) shared power to dispose or to direct the disposition of 0 - 1 -