When you made it for the 320 within a few hours this does not mean that everyone makes it so well in that time
I assume that rudder was from XLW where a few A321s destinated for US Airways have not been completed so there was a rudder avaible just by call
Sticking back to the topic, maybe I didn't see it, how about the investigation.
Is it possible that the acft is stored without tail for further examination of the fuselage, tail-section...?
Regards