If a judge conducting a hearing or trial is unable to proceed, any other judge may proceed with the hearing or trial if that judge certifies familiarity with the record and determines that the action may be completed without prejudice to the parties. If an adequate record is unavailable, the replacement judge must recall any witness if all of the following are true:
The replacement judge also may recall any other witness.
Ariz. R. Fam. Law. proc. 88