GO:0000467:   exonucleolytic trimming to generate mature 3"-end of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA)
Exonucleolytic digestion of a pre-rRNA molecule to generate the mature 3"-end of a 5.8S rRNA molecule derived from an originally tricistronic pre-rRNA transcript that contained the Small Subunit (SSU) rRNA, the 5.8S rRNA, and the Large Subunit (LSU) rRNA in that order from 5" to 3" along the primary transcript.