EXHIBIT 8.1a

                        SIDLEY AUSTIN BROWN & WOOD LLP

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                                January 7, 2005


Greenwich Capital Acceptance, Inc.
600 Steamboat Road
Greenwich, Connecticut 06830

Financial Asset Securities Corp.
600 Steamboat Road
Greenwich, Connecticut 06830

          Re:     Greenwich Capital Acceptance, Inc.
                  Financial Asset Securities Corp.
                  Registration Statement on Form S-3
                  File Nos. 333-121661 and 333-121661-01
                  --------------------------------------

Ladies and Gentlemen:

     We have acted as special tax counsel for Greenwich Capital Acceptance,
Inc., a Delaware corporation, and Financial Asset Securities Corp., a Delaware
corporation (the "Registrants"), in connection with the preparation of the
registration statement on Form S-3 (the "Registration Statement") relating to
the Securities (defined below) and with the authorization and issuance from
time to time in one or more series (each, a "Series") of mortgage-backed
and/or asset-backed certificates (the "Certificates") or mortgage-backed
and/or asset-backed notes (the "Notes" and, together with the Certificates,
the "Securities"). The Registration Statement is being filed with the
Securities and Exchange Commission under the Securities Act of 1933, as
amended. As set forth in the Registration Statement, each Series of
Certificates will be issued under and pursuant to the terms of a separate
pooling and servicing agreement, master pooling and servicing agreement or
trust agreement (each, an "Agreement") by and among the related Registrant, a
trustee (the "Trustee") and, where appropriate, a servicer (the "Servicer"),
each to be identified in the prospectus supplement for such Series of
Certificates. As also set forth in the Registration Statement, each series of
Notes will be issued under an indenture and a related series supplement
(together, an "Indenture") between an owner trustee acting in behalf of an
owner trust (the "Owner Trustee") and an indenture trustee (the "Indenture
Trustee"), each to be identified in the prospectus supplement for the related
Series of Notes.




Greenwich Capital Acceptance, Inc.
Financial Asset Securities Corp.
Page 2


     We have examined the prospectus (the "Prospectus") and forms of
prospectus supplement (each, a "Prospectus Supplement") related thereto
contained in the Registration Statement and such other documents, records and
instruments as we have deemed necessary for the purposes of this opinion.

     In arriving at the opinion expressed below, we have assumed that (i) each
Agreement will be duly authorized by all necessary corporate action on the
part of the related Registrant, the Trustee, the Servicer, if any, and any
other party thereto for the related Series of Certificates and will be duly
executed and delivered by such Registrant, the Trustee, the Servicer, if any,
and any other party thereto substantially in the applicable form filed or
incorporated by reference as an exhibit to the Registration Statement, that
such Series of Certificates will be duly executed and delivered in
substantially the forms set forth in the related Agreement filed or
incorporated by reference as an exhibit to the Registration Statement, and
that such Series of Certificates will be sold as described in the Registration
Statement; and (ii) each Indenture will be duly authorized by all necessary
corporate action on the part of the Owner Trustee, the Indenture Trustee and
any other party thereto for the related Series of Notes and will be duly
executed and delivered by the Owner Trustee, the Indenture Trustee and any
other party thereto substantially in the applicable form filed or incorporated
by reference as an exhibit to the Registration Statement, that such Series of
Notes will be duly executed and delivered in substantially the forms set forth
in Indenture filed or incorporated by reference as an exhibit to the
Registration Statement, and that such Series of Notes will be sold as
described in the Registration Statement.

     As special tax counsel to each Registrant, we have advised such
Registrant with respect to material federal income tax aspects of the proposed
issuance of each Series of Securities pursuant to the related Agreement or
Indenture, as applicable. Such advice has formed the basis for the description
of federal income tax consequences for holders of such Securities that appear
under the headings "Material Federal Income Tax Consequences" in each
Prospectus Supplement and the Prospectus forming a part of the Registration
Statement. Such description does not purport to discuss all possible federal
income tax ramifications of the proposed issuance of the Securities, but with
respect to those federal income tax consequences described therein, it is our
opinion that such description is accurate in all material respects.

     In addition, we hereby confirm and adopt as our opinions those opinions
set forth under "Material Federal Income Tax Consequences" in each of the
Prospectus Supplements and the Prospectus (in each case subject to the terms
and conditions set forth therein).

     This opinion is based on the facts and circumstances set forth in the
Registration Statement and in the other documents reviewed by us. Our opinion
as to the matters set forth herein could change with respect to a particular
Series of Securities as a result of changes in facts or circumstances, changes
in the terms of the documents reviewed by us, or changes in the law subsequent
to the date hereof. Because the Prospectus Supplements and the Prospectus
contemplate Series of Securities with numerous different characteristics, you
should be aware that the particular characteristics of each Series of
Securities must be considered in determining the applicability of this opinion
to a particular Series of Securities.




Greenwich Capital Acceptance, Inc.
Financial Asset Securities Corp.
Page 3

     We hereby consent to the filing of this letter as an exhibit to the
Registration Statement and to the references to this firm under the heading
"Material Federal Income Tax Consequences" in each Prospectus Supplement and
the Prospectus forming a part of the Registration Statement, without admitting
that we are "experts" within the meaning of the 1933 Act or the Rules and
Regulations of the Commission issued thereunder, with respect to any part of
the Registration Statement, including this exhibit.

                               Very truly yours,


                               /s/ SIDLEY AUSTIN BROWN & WOOD LLP
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