Question about Source Lines Form

There is a field on the source lines form called Status.  Doing an examine on the form, the field is asset_status_indicator.   I've not seen this field populated for any of our assets.  How does this get populated?   What table (if any) is the value of this field stored in?   I expected to see it in fa_asset_invoices, but I see no field that resembles a status.  I thought maybe it was a calculated field.  So, I tried digging into the form, FAAXASSET, and I'm not seeing where this is populated.  I found this comment on the field:  mwoodwar 01/10/00.  Added for