UNITED STATES
                             SECURITIES AND EXCHANGE COMMISSION
                                   WASHINGTON, D.C. 20549



                                        FORM 10-K/A
                                      Amendment No. 1


  (Mark one)

  /X/ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934
      For the fiscal year ended December 31, 2006

      OR



  / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934


       Commission file number:  333-130192-04

       J.P. Morgan Alternative Loan Trust 2006-S2
       (exact name of issuing entity as specified in its charter)

       J.P. Morgan Acceptance Corporation I
       (exact name of the depositor as specified in its charter)

       J.P. Morgan Mortgage Acquisition Corp.
       (exact name of the sponsor as specified in its charter)


    Delaware                                        54-2196745
  (State or other jurisdiction of                   54-2196747
  incorporation or organization)                    (I.R.S. Employer
                                                    Identification No.)


   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


  Securities registered pursuant to Section 12(b) of the Act:

        NONE.


  Securities registered pursuant to Section 12(g) of the Act:

        NONE.


  Indicate by check mark if the registrant is a well-known seasoned issuer,
  as defined in Rule 405 of the Securities Act.

        Yes  ___     No  X


  Indicate by check mark if the registrant is not required to file reports
  pursuant to Section 13 or Section 15(d) of the Act.

        Yes  ___     No  X


  Indicate by check mark whether the registrant (1) has filed all reports
  required to be filed by Section 13 or 15(d) of the Securities Exchange
  Act of 1934 during the preceding 12 months (or for such shorter period
  that the registrant was required to file such reports), and (2) has been
  subject to such filing requirements for the past 90 days.

        Yes  X       No  ___


  Indicate by check mark if disclosure of delinquent filers pursuant to
  Item 405 of Regulation S-K ( 229.405 of this chapter) is not contained
  herein, and will not be contained, to the best of registrant's knowledge,
  in definitive proxy or information statements incorporated by reference
  in Part III of this Form 10-K or any amendment to this Form 10-K.

        Not applicable.


  Indicate by check mark whether the registrant is a large accelerated filer,
  an accelerated filer, or a non-accelerated filer. See definition of
  "accelerated filer and large accelerated filer" in Rule 12b-2 of the
  Exchange Act. (Check one):


  Large accelerated filer ___  Accelerated filer ___  Non-accelerated filer X


  Indicate by check mark whether the registrant is a shell company (as
  defined in Rule 12b-2 of the Act).

        Yes  ___     No  X


  State the aggregate market value of the voting and non-voting common
  equity held by non-affiliates computed by reference to the price at which
  the common equity was last sold, or the average bid and asked price of
  such common equity, as of the last business day of the registrant's most
  recently completed second fiscal quarter.

        Not applicable.

  Indicate the number of shares outstanding of each of the registrant's classes
  of common stock, as of the latest practicable date.

        Not applicable.

     Documents Incorporated by Reference

  List hereunder the following documents if incorporated by reference and
  the Part of the Form 10-K (e.g., Part I, Part II, etc.) into which the
  document is incorporated: (1)Any annual report to security holders; (2)
  Any proxy or information statement; and (3)Any prospectus filed pursuant
  to Rule 424(b) or (c) under the Securities Act of 1933. The listed
  documents should be clearly described for identification purposes (e.g.,
  annual report to security holders for fiscal year ended December 24, 1980).

        Not applicable.


  EXPLANATORY NOTE

  The registrant is filing this Form 10-K/A to replace Exhibits 31, 33(a) and
  34(a) to the original Form 10-K filed on April 2, 2007. American Security
  Insurance Company, Standard Guaranty Insurance Company and TrackSure Insurance
  Agency, Inc. (formerly, "Safeco Financial Institution Solutions, Inc.")
  (affiliates of Assurant Inc., collectively, the "Asserting Party") recently
  provided the registrant with a restated report on assessment of compliance
  with servicing criteria for asset-backed securities and a related attestation.
  In the original assessment previously provided to the registrant, the
  Asserting Party excluded Item 1122(d)(4)(xii) from the scope of its assessment
  of compliance. The Asserting Party recently provided the registrant with a
  restated report on assessment of compliance that assesses the Asserting
  Party's compliance with Item 1122(d)(4)(xii) and identifies a material
  instance of noncompliance with this criterion. This material instance of
  noncompliance is noted in this Form 10-K/A under "Item 1122 of Regulation AB,
  Compliance with Applicable Servicing Criteria" under "Additional Disclosure
  Items Pursuant to General Instruction J." The registrant has included this
  restated report on assessment of compliance under Exhibit 33(a), the related
  attestation under Exhibit 34(a) and a revised Rule 13a-14(d)/15d-14(d)
  Certification under Exhibit 31. This Form 10-K/A does not otherwise amend the
  original Form 10-K filed with the Securities and Exchange Commission on April
  2, 2007.

                                   PART I
  Item 1.  Business.

            Omitted.


  Item 1A.  Risk Factors.

            Omitted.


  Item 1B.  Unresolved Staff Comments.

            None.


  Item 2.  Properties.

            Omitted.


  Item 3.  Legal Proceedings.

            Omitted.


  Item 4.  Submission of Matters to a Vote of Security Holders.

            Omitted.


                                PART II

  Item 5. Market for Registrants Common Equity, Related Stockholder
          Matters and Issuer Purchases of Equity Securities.

            Omitted.


  Item 6.  Selected Financial Data.

            Omitted.


  Item 7.  Management's Discussion and Analysis of Financial Condition and
           Results of Operations.

            Omitted.


  Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

            Omitted.


  Item 8.  Financial Statements and Supplementary Data.

            Omitted.


  Item 9.  Changes in and Disagreements With Accountants on Accounting and
           Financial Disclosure.

            Omitted.


  Item 9A. Controls and Procedures.

            Omitted.


  Item 9A(T). Controls and Procedures.

            Omitted.


  Item 9B. Other Information.

            None.


                                PART III

  Item 10. Directors, Executive Officers and Corporate Governance.

            Omitted.


  Item 11. Executive Compensation.

            Omitted.

  Item 12. Security Ownership of Certain Beneficial Owners and
           Management and Related Stockholder Matters.

            Omitted.


  Item 13. Certain Relationships and Related Transactions, and Director
           Independence.

            Omitted.


  Item 14. Principal Accounting Fees and Services.

            Omitted.



                ADDITIONAL DISCLOSURE ITEMS FOR REGULATION AB

  Item 1112(b) of Regulation AB. Significant Obligor Financial Information.

            None.

  Item 1114(b)(2) and 1115(b) of Regulation AB. Significant Enhancement
             Provider Financial Information.

            None.

  Item 1117 of Regulation AB. Legal Proceedings.

            None.

  Item 1119 of Regulation AB. Affiliations and Certain Relationships and
             Related Transactions.

            Provided previously in the prospectus supplement of the Registrant
            relating to the Issuing Entity and filed pursuant to Rule 424 of the
            Securities Act of 1933, as amended.

  Item 1122 of Regulation AB. Compliance with Applicable Servicing Criteria.

            The servicing criteria are attached hereto under Item 15 and as
            otherwise disclosed below.

            American Security Insurance Company's, Standard Guaranty Insurance
            Company's and TrackSure Insurance Agency, Inc.'s (formerly, "Safeco
            Financial Institution Solutions, Inc.") (affiliates of Assurant
            Inc., and collectively, the "Asserting Party")) report on assessment
            of compliance with servicing criteria and the related registered
            public accounting firm's attestation report identify the following
            material instance of noncompliance with the servicing criteria: the
            Asserting Party did not have, during the reporting period,
            sufficient policies and procedures to capture the information with
            respect to the platform transactions necessary to determine, in
            compliance with Section 1122(d)(4)(xii), whether any late payment
            penalties in connection with any payment to be made on behalf of an
            obligor are paid from the servicer's funds and are not charged to
            the obligor, unless the late payment was due to the obligor's error
            or omission.

            The 1122 statements for GreenPoint Mortgage Funding, Inc. has
            disclosed the following material noncompliance with servicing
            criteria 1122(d)(1)(i), 1122(d)(2)(iv), and 1122(d)(3)(ii)
            applicable to the Company's platform covered by this report
            during the year ended December 31, 2006. 1122(d)(1)(i) - There
            were no policies and procedures instituted to monitor the
            performance or other triggers and events of defaults in
            accordance with the transaction agreements; 1122(d)(2)(iv) - The
            related accounts for each transaction were not separately
            maintained as set forth in the transaction agreements; and,
            1122(d)(3)(ii) - Amounts due to investors were not remitted in
            accordance with the timeframes set forth in the transaction
            agreements.

           The 1122 statements for PHH Mortgage Corporation has disclosed the
            following material noncompliance with criteria applicable to the
            Company during the year ended December 31, 2006:

            Standard                Description

            1122(d)(1)(i)   The Company has not instituted policies and
                            procedures to specifically monitor performance or
                            other triggers or events of default stated in the
                            transaction agreements

            1122(d)(1)(iv)  During the months of July, August, and September,
                            the Company's minimum coverage requirement exceeded
                            its $160 million fidelity bond by amounts ranging up
                            to approximately $1.3 million. Effective September
                            27, 2006, the Company's fidelity bond was increased
                            to $170 million.

           1122(d)(3)(i)(A) The Company did not maintain or provide one of the
                            required monthly reports stated in the transaction
                            agreements during the year

           1122(d)(3)(i)(D) The Company did not perform procedures to agree the
                            unpaid principal balance and number of loans
                            serviced by the Company with that of the investors
                            or trustees



            The 1122 statements for SunTrust Mortgage, Inc. has disclosed the
            following material noncompliance with the servicing criteria set
            forth in Items 1122(d)(1)(i), 1122(d)(2)(i), and 1122(d)(2)(iv) of
            Regulation AB applicable to the Company during the year ended
            December 31, 2006. Specifically, SunTrust Mortgage, Inc. did not
            (i) institute policies and procedures to monitor any performance or
            other triggers and events of default in accordance with the
            transaction agreements as required by Item 1122(d)(1)(i); (ii)
            deposit payments on pool assets into the appropriate custodial bank
            accounts and related bank clearing accounts no more than two
            business days after receipt, or such other number of days specified
            in the transaction agreements as required by Item 1122(d)(2)(i); and
            (iii) separately maintain the related accounts for the transaction
            as set forth in the transaction agreements, as required by Item
            1122(d)(2)(iv).

            The 1122 statements for Wells Fargo Bank, National Association
            (Corporate Trust Services) has disclosed material noncompliance with
            criterion 1122(d)(3)(i), as applicable to the Company during the
            twelve months ended December 31. 2006.  Certain monthly investor or
            remittance reports included errors in the calculation and/or the
            reporting of delinquencies for the pool assets.


  Item 1123 of Regulation AB. Servicer Compliance Statement.


           The servicer compliance statements are attached hereto under Item 15.


                                PART IV


  Item 15. Exhibits, Financial Statement Schedules.

   (a) Exhibits

   (4.1) Pooling and Servicing Agreement (filed as an exhibit to Form 8-K on
         May 12, 2006 and incorporated by reference herein).

    (31) Rule 13a-14(d)/15d-14(d) Certifications.

    (33) Reports on assessment of compliance with servicing criteria for
         asset-backed securities.


      <TABLE>

      
         <c>
      a) Assurant Inc. as Sub-Contractor for GreenPoint Mortgage Funding, Inc.<F1>
      b) Chase Home Finance LLC, as Sub-Servicer for JPMorgan Chase Bank, N.A. <F1>
      c) GreenPoint Mortgage Funding, Inc., as Servicer <F1>
      d) JPMorgan Chase Bank, N.A., as Named Servicer <F1>
      e) JPMorgan Chase Bank, N.A., as Custodian <F1>
      f) LandAmerica Tax and Flood Services as Sub-Contractor for GreenPoint Mortgage Funding, Inc.<F1>
      g) PHH Mortgage Corporation, as Servicer <F1>
      h) SunTrust Mortgage, Inc., as Servicer <F1>
      i) The Bank of New York, as Custodian <F1>
      j) Wells Fargo Bank, N.A., as Master Servicer <F1>
      k) Wells Fargo Bank, N.A., as Securities Administrator <F1>
      l) Wells Fargo Bank, N.A., as Paying Agent <F1>
      m) ZC Sterling Insurance Agency, Inc. as Sub-Contractor for SunTrust Mortgage, Inc.<F1>

      </TABLE>

     (34) Attestation reports on assessment of compliance with servicing
          criteria for asset-backed securities.

      <TABLE>

      
        <c>
      a) Assurant Inc. as Sub-Contractor for GreenPoint Mortgage Funding, Inc.<F1>
      b) Chase Home Finance LLC, as Sub-Servicer for JPMorgan Chase Bank, N.A. <F1>
      c) GreenPoint Mortgage Funding, Inc., as Servicer <F1>
      d) JPMorgan Chase Bank, N.A., as Named Servicer <F1>
      e) JPMorgan Chase Bank, N.A., as Custodian <F1>
      f) LandAmerica Tax and Flood Services as Sub-Contractor for GreenPoint Mortgage Funding, Inc.<F1>
      g) PHH Mortgage Corporation, as Servicer <F1>
      h) SunTrust Mortgage, Inc., as Servicer <F1>
      i) The Bank of New York, as Custodian <F1>
      j) Wells Fargo Bank, N.A., as Master Servicer <F1>
      k) Wells Fargo Bank, N.A., as Securities Administrator <F1>
      l) Wells Fargo Bank, N.A., as Paying Agent <F1>
      m) ZC Sterling Insurance Agency, Inc. as Sub-Contractor for SunTrust Mortgage, Inc.<F1>

      </TABLE>

     (35) Servicer compliance statement.

      <TABLE>

      
         <c>
      b) Chase Home Finance LLC, as Sub-Servicer for JPMorgan Chase Bank, N.A. <F1>
      c) GreenPoint Mortgage Funding, Inc., as Servicer <F1>
      d) JPMorgan Chase Bank, N.A., as Named Servicer <F1>
      g) PHH Mortgage Corporation, as Servicer <F1>
      h) SunTrust Mortgage, Inc., as Servicer <F1>
      j) Wells Fargo Bank, N.A., as Master Servicer <F1>
      k) Wells Fargo Bank, N.A., as Securities Administrator <F1>

  (99.1) Interest Rate Cap Agreements (filed as an exhibit to Form 8-K on May
         12, 2006 and incorporated by reference herein).


      </TABLE>

   (b) Not applicable.

   (c) Omitted.


  <F1> Filed herewith.




                                SIGNATURES

  Pursuant to the requirements of Section 13 or 15(d) of the Securities
  Exchange Act of 1934, the registrant has duly caused this report to be
  signed on its behalf by the undersigned, thereunto duly authorized.



    J.P. Morgan Alternative Loan Trust 2006-S2
    (Issuing Entity)

    Wells Fargo Bank, N.A.
    (Master Servicer)

    /s/ John Sadowski
    John Sadowski, Vice President
    (senior officer in charge of the servicing function of the master servicer)

    Date:      June 5, 2008


  Exhibit Index

  Exhibit No.

    (4.1) Pooling and Servicing Agreement (filed as an exhibit to Form 8-K on
          May 12, 2006 and incorporated by reference herein).

    (31) Rule 13a-14(d)/15d-14(d) Certifications.

    (33) Reports on assessment of compliance with servicing criteria for
         asset-backed securities.



      <TABLE>

      
         <c>
      a) Assurant Inc. as Sub-Contractor for GreenPoint Mortgage Funding, Inc.
      b) Chase Home Finance LLC, as Sub-Servicer for JPMorgan Chase Bank, N.A.
      c) GreenPoint Mortgage Funding, Inc., as Servicer
      d) JPMorgan Chase Bank, N.A., as Named Servicer
      e) JPMorgan Chase Bank, N.A., as Custodian
      f) LandAmerica Tax and Flood Services as Sub-Contractor for GreenPoint Mortgage Funding, Inc.
      g) PHH Mortgage Corporation, as Servicer
      h) SunTrust Mortgage, Inc., as Servicer
      i) The Bank of New York, as Custodian
      j) Wells Fargo Bank, N.A., as Master Servicer
      k) Wells Fargo Bank, N.A., as Securities Administrator
      l) Wells Fargo Bank, N.A., as Paying Agent
      m) ZC Sterling Insurance Agency, Inc. as Sub-Contractor for SunTrust Mortgage, Inc.

      </TABLE>

     (34) Attestation reports on assessment of compliance with servicing
          criteria for asset-backed securities.

      <TABLE>

      
        <c>
      a) Assurant Inc. as Sub-Contractor for GreenPoint Mortgage Funding, Inc.
      b) Chase Home Finance LLC, as Sub-Servicer for JPMorgan Chase Bank, N.A.
      c) GreenPoint Mortgage Funding, Inc., as Servicer
      d) JPMorgan Chase Bank, N.A., as Named Servicer
      e) JPMorgan Chase Bank, N.A., as Custodian
      f) LandAmerica Tax and Flood Services as Sub-Contractor for GreenPoint Mortgage Funding, Inc.
      g) PHH Mortgage Corporation, as Servicer
      h) SunTrust Mortgage, Inc., as Servicer
      i) The Bank of New York, as Custodian
      j) Wells Fargo Bank, N.A., as Master Servicer
      k) Wells Fargo Bank, N.A., as Securities Administrator
      l) Wells Fargo Bank, N.A., as Paying Agent
      m) ZC Sterling Insurance Agency, Inc. as Sub-Contractor for SunTrust Mortgage, Inc.

      </TABLE>

     (35) Servicer compliance statement.

      <TABLE>

      
         <c>
      b) Chase Home Finance LLC, as Sub-Servicer for JPMorgan Chase Bank, N.A.
      c) GreenPoint Mortgage Funding, Inc., as Servicer
      d) JPMorgan Chase Bank, N.A., as Named Servicer
      g) PHH Mortgage Corporation, as Servicer
      h) SunTrust Mortgage, Inc., as Servicer
      j) Wells Fargo Bank, N.A., as Master Servicer
      k) Wells Fargo Bank, N.A., as Securities Administrator

  (99.1) Interest Rate Cap Agreements (filed as an exhibit to Form 8-K on May
         12, 2006 and incorporated by reference herein).


      </TABLE>