If a judgment is opened in whole or in part the issues to be tried shall be defined by the complaint if a complaint has been filed, and by the petition, answer and the order of the court opening the judgment. There shall be no further pleadings. The right to a jury trial on the opened judgment shall be deemed waived unless a party files and serves a written demand for jury trial within twenty days after the order opening judgment; but if the issue is referred to compulsory arbitration, Rule 1007.1 shall apply.
231 Pa. Code r. 2960