What about his flying history before Jet*? Surely the company would check up on his previous history? These pilots generally have a history of marginal performances and in such a small industry it is not too difficult to find out anybodys history.I see Jet* as responsible for their own incompetence in this case.
In my experience Jetstar have no interest in technical ability when checking references. All they are interested in is behavioral stuff. "So, you worked with Applicant Bloggs? Tell me about a time when he's had to resolve a crew conflict?"