Oregon Revised Statutes Probate Law § 113.215

(1) When a personal representative dies, is removed by the court, or resigns and the resignation is accepted by the court, the court may appoint, and, if the personal representative was the sole or the last surviving personal representative and administration is not completed, the court shall appoint another personal representative in place of the personal representative.

(2) If, after a will has been proven and letters testamentary or of administration with the will annexed have been issued, the will is set aside, declared void or inoperative, the letters testamentary or of administration with the will annexed shall be revoked and letters of administration issued.

(3) If, after administration has been granted, a will of the decedent is found and proven, the letters of administration shall be revoked and letters testamentary or of administration with the will annexed shall be issued.

(4) When a successor personal representative is appointed, the successor has all the rights and powers of the predecessor or of the executor named in the will, except that the successor shall not exercise powers given in the will which by its terms are personal to the personal representative named therein.