The above advice is pretty good (need to change you user name to just 'midwesterner'!)
Since you have live aerial roots, you can probably trim off the black parts of the roots. Before repotting, you may be able to perk up the plant with a short daily soak of the roots. Hang the bare roots in a jar or glass, soak just the roots (half hour a day maybe), drain and leave dry until the next day. Repeat daily for a week or two.
After that, re-pot as instructed above. Afterward, I would wait a day or two before watering resumes.
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