The search for a new managing director of the Pittsburgh Symphony is attracting the kind of attention usually reserved for the hiring of a music director. That’s what happens when an orchestra’s major challenges seem to be managerial rather than artistic. “Looming large over the search is the PSO’s $800,000 cash shortfall this year and the effort to stave off a $2.5 million structural deficit next year, not to mention the hiring of a replacement for outgoing music director Mariss Jansons.”