Or a simpler way would be to make sure you have the numbers among othr committee members then propose a motion on the next SC agenda that the position of chair be declared vacant and a new election for committee chair be held by the sitting members.
Your challenge would be to make sure the “rebels” held their nerve in the face of what would surely be ramped up bullying. And then there’s the fact that the chair would still be on the committee, if she didn’t resign in high dudgeon.