But where did the 'no part' info come from? (Not the document, but the info therein). Was it their (possibly mistaken) observation after it landed in Reno? I would think that the log books would be the definitive answer, but hard to say where they would have ended up.
If you go to dropzone and search the incidents thread, sometimes the pilots in there refer to a web page where you enter the N number of an aircraft and it tells you the history of it. Not sure if it would have detailed log book info, but it would certainly have incident and ownership records. The last owner would be a place to inquire about the logs.
Edit: A quick google search of 'N467US' shows that it's last owner was Key Airlines, where it was registered as N29KA.