EXHIBIT 4.7


                              CERTIFICATE OF TRUST

                                       OF

                              DEFS CAPITAL TRUST I


         THIS Certificate of Trust of DEFS Capital Trust I (the "Trust"), dated
as of April 30, 2002, is being duly executed and filed by the undersigned, as
trustee, to form a business trust under the Delaware Business Trust Act (12 Del.
C. ss.3801, et seq.).

         1.       Name. The name of the business trust formed hereby is DEFS
                  Capital Trust I.

         2.       Delaware Trustee. The name and business address of the trustee
                  of the Trust with a principal place of business in the State
                  of Delaware are Chase Manhattan Bank USA, National
                  Association, 500 Stanton Christiana Rd., Building 4,
                  3rd Floor, Newark, Delaware 19713.

         3.       Effective Date. This Certificate of Trust shall be effective
                  upon filing.

         IN WITNESS WHEREOF, the undersigned, being the sole trustee of the
Trust, has executed this Certificate of Trust as of the date first-above
written.

                                    CHASE MANHATTAN BANK USA, NATIONAL
                                    ASSOCIATION, not in its individual capacity
                                    but solely as trustee of the Trust

                                    By:   /s/ John J. Cashin
                                       -----------------------------------------
                                       Name:  John J. Cashin
                                       Title: Vice President