<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Kremmen:
If they don't want to sound ignorant, they would be better off not using "momentarily" at all. It means "for a moment" so, unless they are boarding one or two pax, they are simply sounding stupid.</font>
You are right, of course. But as the term seems to have increasingly evolved in oral language to mean "real-soon-now," then combining it with "at this time" is either self-contradictory or redundant.