Onan,
where does it say it was "post-maintenance"?
The LA Times article from the first post quotes the airport manager, and some others quote police as saying that.
The same piece also mentions someone with a ticket for a ride in the Bushmaster, but the flights were allegedly cancelled just before the accident. On the pic at the link below the plane is flying over what (to me) looks like a ticket stall offering tri-motor rides:
http://www.ocregister.com/ocr/2004/0...cle_254769.php