Contacting the person that previously had the job I'm applying for: Appropriate?

I'm applying for a position in a different department at my current employer, a university. The person that previously held this position has moved to a different position at the university (new department).

After some searching, I'm unable to locate an org chart for the department to which I'm applying. Would it be appropriate to contact the person that just left this job (I've had no relationship with him previously) and ask who the direct report/hiring manager would be?

Thanks for any advice you can offer on this.

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