I've been over the regulations but I'm still not clear on this situation. I'm looking at an EAB that was previously registered and had an Airworthiness Certificate. The registration was cancelled (I don't know why) and the N number was reassigned. Is there a process to get the aircraft reregistered and a new Airworthiness Certificate?

I could see having to get the airworthiness inspection done again, with a new N-number. But it would seem that the proof of amateur built eligibility would be taken care of already by showing the previous Airworthiness Certificate. No construction logs available anymore so proving eligibility otherwise would be difficult.

Anyone been down this road before?