saw an ad for a plane that "needs current airworthiness". I looked it up and it's registration expired 2 yrs ago. All I can find in my internet search is that the n-number will not be available for 5 yrs. I would therefore need to apply for a new n- number and I assume I would need the AW cert updated for the new n-number. My question is would I also need to get a new AW done? I thought they never expired. So would I just need to apply for a new registration and n-number change along with it being changed on the AW cert? or would I have to have a whole new AW inspection done along with all that? I know that the annual is needed but that is another issue. I know I will have to go through the FAA but my experience is the people I have talked to don't know as much as I would like for them to and I usually leave with more questions than answers.