UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D. C. 20549 Form 8-K/A Current Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 25, 2004 BEAR STEARNS ASSET BACKED SECURITIES TRUST Asset Backed Certificates, Series 2003-AC7 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-91334-17 54-2139189 Pooling and Servicing Agreement) (Commission 54-2139190 (State or other File Number) 54-2139191 jurisdiction IRS EIN of Incorporation) c/o Wells Fargo Bank, N.A., 9062 Old Annapolis Road Columbia, MD 21045 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (410) 884-2000 (Former name or former address, if changed since last report) ITEM 5. Other Events Subsequent to filing the 8-K relating to the payment date on May 25, 2004, a revision was made to the BEAR STEARNS ASSET BACKED SECURITIES TRUST, Asset Backed Certificates, Series 2003-AC7 which was not included in the original 8-K filed. The 8-K is being amended because the delinquency stratification table has been revised. This revision was not previously disclosed in a 1934 Act filing. The revised data has been and will continue to be available on the Wells Fargo Bank, as Securities Administrator, website at www.ctslink.com. ITEM 7. Financial Statements and Exhibits (c) Exhibits furnished in accordance with Item 601(a) of Regulation S-K Exhibit Number Description EX-99.1 Amended monthly report distributed to holders of Asset Backed Certificates, Series 2003-AC7 Trust, relating to the May 25, 2004 distribution. Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. BEAR STEARNS ASSET BACKED SECURITIES TRUST Asset Backed Certificates, Series 2003-AC7 Trust By: Wells Fargo Bank, N.A. as Securities Administrator By: /s/ Beth Belfield as Assistant Vice President By: Beth Belfield as Assistant Vice President Date: 7/14/04 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Amended monthly report distributed to holders of Asset Backed Certificates, Series 2003-AC7 Trust, relating to the May 25, 2004 distribution. EX-99.1 Bear Stearns Asset Backed Securities Asset Backed Certificates Record Date: 4/30/04 Distribution Date: 5/25/04 BSA Series: 2003-AC7 Contact: Customer Service - CTSLink Wells Fargo Bank, N.A. Securities Administration Services 7485 New Horizon Way Frederick, MD 21703 Telephone: (301) 815-6600 Fax: (301) 815-6660 Certificateholder Distribution Summary Certificate Certificate Beginning Class Pass-Through Certificate Interest Principal Class CUSIP Description Rate Balance Distribution Distribution <s> <c> <c> <c> <c> <c> <c> A-1 07384YPH3 SEN 5.00000% 220,227,922.62 917,616.34 8,212,727.48 A-2 07384YPJ9 SEN 5.25000% 240,548,204.76 1,052,398.40 8,970,510.31 A-3 07384YPK6 SEN 1.78000% 85,125,506.25 126,269.50 3,174,495.66 A-4 07384YPL4 SEN 5.72000% 0.00 405,764.91 0.00 M-1 07384YPN0 MEZ 5.20000% 38,992,973.83 168,969.55 1,454,123.82 M-2 07384YPP5 MEZ 2.70000% 38,992,973.83 84,809.72 1,454,123.82 B 07384YPQ3 SUB 3.60000% 26,167,591.61 75,886.02 975,840.37 C 07383GCX2 OC 0.00000% 2,007,302.32 0.00 0.00 P 07383GCW4 P 0.00000% 100.00 22,570.84 0.00 R-1 07383GCY0 RES 0.00000% 0.00 0.00 0.00 R-2 07383GCZ7 RES 0.00000% 0.00 0.00 0.00 R-3 07383GDA1 RES 0.00000% 0.00 0.00 0.00 Totals 652,062,575.22 2,854,285.28 24,241,821.46 Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses <s> <c> <c> <c> <c> A-1 0.00 212,015,195.15 9,130,343.82 0.00 A-2 0.00 231,577,694.45 10,022,908.71 0.00 A-3 0.00 81,951,010.59 3,300,765.16 0.00 A-4 0.00 0.00 405,764.91 0.00 M-1 0.00 37,538,850.01 1,623,093.37 0.00 M-2 0.00 37,538,850.01 1,538,933.54 0.00 B 0.00 25,191,751.23 1,051,726.39 0.00 C 0.00 2,650,866.22 0.00 0.00 P 0.00 100.00 22,570.84 0.00 R-1 0.00 0.00 0.00 0.00 R-2 0.00 0.00 0.00 0.00 R-3 0.00 0.00 0.00 0.00 Totals 0.00 628,464,317.66 27,096,106.74 0.00 <FN> All distributions required by the Pooling and Servicing Agreement have been calculated by the Certificate Administrator on behalf of the Trustee. </FN> Principal Distribution Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Realized Class Amount Balance Distribution Distribution Accretion Loss (1) <s> <c> <c> <c> <c> <c> <c> A-1 240,600,000.00 220,227,922.62 0.00 8,212,727.48 0.00 0.00 A-2 262,800,000.00 240,548,204.76 0.00 8,970,510.31 0.00 0.00 A-3 93,000,000.00 85,125,506.25 0.00 3,174,495.66 0.00 0.00 A-4 0.00 0.00 0.00 0.00 0.00 0.00 M-1 42,600,000.00 38,992,973.83 0.00 1,454,123.82 0.00 0.00 M-2 42,600,000.00 38,992,973.83 0.00 1,454,123.82 0.00 0.00 B 28,588,212.00 26,167,591.61 0.00 975,840.37 0.00 0.00 C 0.24 2,007,302.32 0.00 0.00 0.00 0.00 P 100.00 100.00 0.00 0.00 0.00 0.00 R-1 0.00 0.00 0.00 0.00 0.00 0.00 R-2 0.00 0.00 0.00 0.00 0.00 0.00 R-3 0.00 0.00 0.00 0.00 0.00 0.00 Totals 710,188,312.24 652,062,575.22 0.00 24,241,821.46 0.00 0.00 <FN> (1) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description. </FN> Principal Distribution Statement (continued) Total Ending Ending Total Principal Certificate Certificate Principal Class Reduction Balance Percentage Distribution <s> <c> <c> <c> <c> A-1 8,212,727.48 212,015,195.15 0.88119366 8,212,727.48 A-2 8,970,510.31 231,577,694.45 0.88119366 8,970,510.31 A-3 3,174,495.66 81,951,010.59 0.88119366 3,174,495.66 A-4 0.00 0.00 0.00000000 0.00 M-1 1,454,123.82 37,538,850.01 0.88119366 1,454,123.82 M-2 1,454,123.82 37,538,850.01 0.88119366 1,454,123.82 B 975,840.37 25,191,751.23 0.88119366 975,840.37 C 0.00 2,650,866.22 45,275.91666670 0.00 P 0.00 100.00 1.00000000 0.00 R-1 0.00 0.00 0.00000000 0.00 R-2 0.00 0.00 0.00000000 0.00 R-3 0.00 0.00 0.00000000 0.00 Totals 24,241,821.46 628,464,317.66 0.88492630 24,241,821.46 Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion <s> <c> <c> <c> <c> <c> A-1 240,600,000.00 915.32802419 0.00000000 34.13436193 0.00000000 A-2 262,800,000.00 915.32802420 0.00000000 34.13436191 0.00000000 A-3 93,000,000.00 915.32802419 0.00000000 34.13436194 0.00000000 A-4 0.00 0.00000000 0.00000000 0.00000000 0.00000000 M-1 42,600,000.00 915.32802418 0.00000000 34.13436197 0.00000000 M-2 42,600,000.00 915.32802418 0.00000000 34.13436197 0.00000000 B 28,588,212.00 915.32802436 0.00000000 34.13436174 0.00000000 C 0.24 363759666.66667000 0.00000000 0.00000000 0.00000000 P 100.00 1000.00000000 0.00000000 0.00000000 0.00000000 R-1 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R-3 0.00 0.00000000 0.00000000 0.00000000 0.00000000 <FN> (2) All Classes are per $1,000 denomination. </FN> Principal Distribution Factors Statement (continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution <s> <c> <c> <c> <c> <c> A-1 0.00000000 34.13436193 881.19366230 0.88119366 34.13436193 A-2 0.00000000 34.13436191 881.19366229 0.88119366 34.13436191 A-3 0.00000000 34.13436194 881.19366226 0.88119366 34.13436194 A-4 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 M-1 0.00000000 34.13436197 881.19366221 0.88119366 34.13436197 M-2 0.00000000 34.13436197 881.19366221 0.88119366 34.13436197 B 0.00000000 34.13436174 881.19366227 0.88119366 34.13436174 C 0.00000000 0.00000000 111,045,275,916.66670000 1045275.91666670 0.00000000 P 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 R-1 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R-3 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 <FN> (3) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description. </FN> Interest Distribution Statement Beginning Payment of Original Current Certificate/ Current Unpaid Current Face Certificate Notional Accrued Interest Interest Class Amount Rate Balance Interest Shortfall Shortfall <s> <c> <c> <c> <c> <c> <c> A-1 240,600,000.00 5.00000% 220,227,922.62 917,616.34 0.00 0.00 A-2 262,800,000.00 5.25000% 240,548,204.76 1,052,398.40 0.00 0.00 A-3 93,000,000.00 1.78000% 85,125,506.25 126,269.50 0.00 0.00 A-4 0.00 5.72000% 85,125,506.25 405,764.91 0.00 0.00 M-1 42,600,000.00 5.20000% 38,992,973.83 168,969.55 0.00 0.00 M-2 42,600,000.00 2.70000% 38,992,973.83 84,809.72 0.00 0.00 B 28,588,212.00 3.60000% 26,167,591.61 75,886.02 0.00 0.00 C 0.24 0.00000% 2,007,302.32 0.00 0.00 0.00 P 100.00 0.00000% 100.00 0.00 0.00 0.00 R-1 0.00 0.00000% 0.00 0.00 0.00 0.00 R-2 0.00 0.00000% 0.00 0.00 0.00 0.00 R-3 0.00 0.00000% 0.00 0.00 0.00 0.00 Totals 710,188,312.24 2,831,714.44 0.00 0.00 Interest Distribution Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (4) Distribution Shortfall Balance <s> <c> <c> <c> <c> <c> A-1 0.00 0.00 917,616.34 0.00 212,015,195.15 A-2 0.00 0.00 1,052,398.40 0.00 231,577,694.45 A-3 0.00 0.00 126,269.50 0.00 81,951,010.59 A-4 0.00 0.00 405,764.91 0.00 81,951,010.59 M-1 0.00 0.00 168,969.55 0.00 37,538,850.01 M-2 0.00 0.00 84,809.72 0.00 37,538,850.01 B 0.00 0.00 75,886.02 0.00 25,191,751.23 C 0.00 0.00 0.00 0.00 2,650,866.22 P 0.00 0.00 22,570.84 0.00 100.00 R-1 0.00 0.00 0.00 0.00 0.00 R-2 0.00 0.00 0.00 0.00 0.00 R-3 0.00 0.00 0.00 0.00 0.00 Totals 0.00 0.00 2,854,285.28 0.00 <FN> (4) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description. </FN> Interest Distribution Factors Statement Beginning Payment of Original Current Certificate/ Current Unpaid Current Face Certificate Notional Accrued Interest Interest Class (5) Amount Rate Balance Interest Shortfall Shortfall <s> <c> <c> <c> <c> <c> <c> A-1 240,600,000.00 5.00000% 915.32802419 3.81386675 0.00000000 0.00000000 A-2 262,800,000.00 5.25000% 915.32802420 4.00456012 0.00000000 0.00000000 A-3 93,000,000.00 1.78000% 915.32802419 1.35773656 0.00000000 0.00000000 A-4 0.00 5.72000% 915.32802419 4.36306355 0.00000000 0.00000000 M-1 42,600,000.00 5.20000% 915.32802418 3.96642136 0.00000000 0.00000000 M-2 42,600,000.00 2.70000% 915.32802418 1.99083850 0.00000000 0.00000000 B 28,588,212.00 3.60000% 915.32802436 2.65445142 0.00000000 0.00000000 C 0.24 0.00000% 363759666.66667000 0.00000000 0.00000000 0.00000000 P 100.00 0.00000% 1000.00000000 0.00000000 0.00000000 0.00000000 R-1 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R-3 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 <FN> (5) All Classes are per $1,000 denomination. </FN> Interest Distribution Factors Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (6) Distribution Shortfall Balance <s> <c> <c> <c> <c> <c> A-1 0.00000000 0.00000000 3.81386675 0.00000000 881.19366230 A-2 0.00000000 0.00000000 4.00456012 0.00000000 881.19366229 A-3 0.00000000 0.00000000 1.35773656 0.00000000 881.19366226 A-4 0.00000000 0.00000000 4.36306355 0.00000000 881.19366226 M-1 0.00000000 0.00000000 3.96642136 0.00000000 881.19366221 M-2 0.00000000 0.00000000 1.99083850 0.00000000 881.19366221 B 0.00000000 0.00000000 2.65445142 0.00000000 881.19366227 C 0.00000000 0.00000000 0.00000000 0.00000000 45275916.66670000 P 0.00000000 0.00000000 225708.40000000 0.00000000 1000.00000000 R-1 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R-3 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 <FN> (6) Amount Does Not Include Excess Special Hazard, Bankruptcy,or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description. </FN> CERTIFICATEHOLDER ACCOUNT STATEMENT CERTIFICATE ACCOUNT <s> <c> Beginning Balance 0.00 Deposits Payments of Interest and Principal 27,335,706.34 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 48,694.59 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 27,384,400.93 Withdrawals Reimbursement for Servicer Advances 146,567.57 Payment of Service Fee 141,726.62 Payment of Interest and Principal 27,096,106.74 Total Withdrawals (Pool Distribution Amount) 27,384,400.93 Ending Balance 0.00 PREPAYMENT/CURTAILMENT INTEREST SHORTFALL <s> <c> Total Prepayment/Curtailment Interest Shortfall 0.00 Servicing Fee Support 0.00 Non-Supported Prepayment/Curtailment Interest Shortfall 0.00 SERVICING FEES <s> <c> Gross Servicing Fee 135,846.36 Back-up Servicing Fee 5,880.26 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee 141,726.62 OTHER ACCOUNTS Beginning Current Current Ending Account Type Balance Withdrawals Deposits Balance <s> <c> <c> <c> <c> Net WAC Reserve Fund 5,000.00 0.00 0.00 5,000.00 Class P Certificate Account 100.00 0.00 0.00 100.00 LOAN STATUS STRATIFICATION/CREDIT ENHANCEMENT STATEMENT DELINQUENCY STATUS DELINQUENT BANKRUPTCY FORECLOSURE REO Total <s> <c> <c> <c> <c> <c> No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 3 0 0 3 593,458.65 0.00 0.00 593,458.65 30 Days 24 0 0 0 24 4,460,969.64 0.00 0.00 0.00 4,460,969.64 60 Days 5 0 0 0 5 819,335.33 0.00 0.00 0.00 819,335.33 90 Days 4 0 1 0 5 1,043,789.04 0.00 541,265.01 0.00 1,585,054.05 120 Days 1 0 0 0 1 161,016.03 0.00 0.00 0.00 161,016.03 150 Days 1 0 0 0 1 165,785.60 0.00 0.00 0.00 165,785.60 180+ Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 35 3 1 0 39 6,650,895.64 593,458.65 541,265.01 0.00 7,785,619.30 No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 0.099502% 0.000000% 0.000000% 0.099502% 0.094340% 0.000000% 0.000000% 0.094340% 30 Days 0.796020% 0.000000% 0.000000% 0.000000% 0.796020% 0.709142% 0.000000% 0.000000% 0.000000% 0.709142% 60 Days 0.165837% 0.000000% 0.000000% 0.000000% 0.165837% 0.130246% 0.000000% 0.000000% 0.000000% 0.130246% 90 Days 0.132670% 0.000000% 0.033167% 0.000000% 0.165837% 0.165927% 0.000000% 0.086043% 0.000000% 0.251969% 120 Days 0.033167% 0.000000% 0.000000% 0.000000% 0.033167% 0.025596% 0.000000% 0.000000% 0.000000% 0.025596% 150 Days 0.033167% 0.000000% 0.000000% 0.000000% 0.033167% 0.026354% 0.000000% 0.000000% 0.000000% 0.026354% 180+ Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% Totals 1.160862% 0.099502% 0.033167% 0.000000% 1.293532% 1.057265% 0.094340% 0.086043% 0.000000% 1.237648% OTHER INFORMATION <s> <c> Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 48,694.59 COLLATERAL STATEMENT Collateral Description Fixed 30 Year Weighted Average Gross Coupon 6.650773% Weighted Average Net Coupon 6.400773% Weighted Average Pass-Through Rate 6.400773% Weighted Average Maturity(Stepdown Calculation ) 335 Beginning Scheduled Collateral Loan Count 3,107 Number Of Loans Paid In Full 92 Ending Scheduled Collateral Loan Count 3,015 Beginning Scheduled Collateral Balance 652,062,475.22 Ending Scheduled Collateral Balance 628,464,217.67 Ending Actual Collateral Balance at 30-Apr-2004 629,065,904.72 Monthly P &I Constant 4,331,749.80 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Ending Scheduled Balance for Premium Loans 628,464,217.67 Scheduled Principal 717,817.11 Unscheduled Principal 22,880,440.44 Required Overcollateralization Amount 0.00 Overcollateralized Increase Amount 643,563.90 Overcollateralized reduction Amount 0.00 Specified O/C Amount 4,971,317.00 Overcollateralized Amount 2,650,866.22 Overcollateralized Deficiency Amount 2,320,450.78 Base Overcollateralized Amount 0.00 Extra principal distribution Amount 643,563.90 Excess Cash Amount 672,015.00 Miscellaneous Reporting 3 Month Rolling Dlq Average Percentage 0.009941%