Hi Enrique,
try TA SE16N, Table E071K
There you can specify the table and concatenated key. Maybe, you'll have to gradually generalize the Selection (leaving out more fields and put in *) in order to find your entry.
Table E071K holds the key specified entries of your transport requests.
I don't have SAP Access right now, so ican't give you the exact fields, but the easiest way to find out is, to create a new TR for a key specified table entry and then look it up in E071K. Thus you can "reverse engeneer" it.
Best regards - Jörg