Question juridique clé
Whether the appeal against the interlocutory decision on expert appointment was admissible.
Solution extraite
The appeal was admissible only as to the recusal question under Art. 92 BGG; complaints about other aspects of the expert examination were not admissible absent irreparable harm.
Motifs extraits
Article 92 BGG covers only formal recusal grounds. Other objections to expert evidence require showing irreparable prejudice under Art. 93 BGG, which the appellant failed to do.