Container receipt status (v407a)

All,
The flag for container "received" is apparently being tripped on receipt (v407a) (actually, it's a "not not-received" flag...). This is a good thing, except I can't find where in the tables this flag exists. Is it tripped by the RcvDtl update to Contianer Number? We have an incoming container report, ad I can't figure out where to look for status of "received"...
Thanks in Advance!
- leAnn