What are three reasons an arbitrator's decision may not be the final and binding decision?

What are three reasons an arbitrator's decision may not be the final and binding decision? Provide court examples defending your reasons. Your response should be at least 200 words in length.  Reference and cite work.

Arbitrator When all is said in done, discretion is a definite choice that is tying and difficult to topple. In anycase, three reasons an authority's choice may be toppled by Federal Arbitration...