Per FRS 38164, the viewport that was on the A1F2 port (South door) of HAM5 was removed and replaced with a blank.  The CF knife edges on both the door flange and the viewport looked good.  

There was no sticker on the viewport, but the scribe on the edge of the flange indicate that it is a ZV-800, serial number R140.

Another port to add to the pumpdown leak check list.