I recently saw a KR for sale that was "almost ready to fly". After looking at it I looked up the tail number and the plane has been "deregistered", as well as the Airworthiness Certificate. I've always thought that a deregistered aircraft was "dead in the water" but according to something I found on the web, there is apparently a path back IF the Airworthiness Certificate hasn't been "surrendered". I needed clarification on this, and others may need it also. I'm too lazy to look up the official regulation on this, but I'm sure it's not too hard to find. From a thread on Vans Aircraft:
"Has the original airworthiness been surrendered? If so, the aircraft is "dead in the water". Once the airworthiness certificate for an experimental amateur-built aircraft has been surrendered, there is no path back. If the airworthiness is still valid, then no problem. It can be put back into service by going through a new phase I test program. No one but the original builder is eligible for the repairman certificate." Just FYI... -- Mark Langford ML at N56ML.com http://www.n56ml.com