Answer
Pool work is built around individual (person) resources picking up unassigned tasks, not crews — only tasks without an assignee can be sent to the pool, so transferring crew work into that same pool mechanism generally isn't supported.
Pool work is built around individual (person) resources picking up unassigned tasks, not crews — only tasks without an assignee can be sent to the pool, so transferring crew work into that same pool mechanism generally isn't supported.