What was found
HYD PRESS SYS 4 EICAS. #4 HYD QTY 40%(<P>INSPECTION FOUND #4 HYDRAULIC RETURN FLEX LINE IN THE R/H HORIZONTAL STABILIZER, CLOSE TO THE R/H INBOARD ELEVATOR PCU HAD RUPTURED. REMOVED THE DAMAGED LINE. INSTALLED TEMPORARY FLEX LINE, WITH RE-INSPECTION DUE EVERY 25 FC, AND PERMANENT REPAIR DUE AT NEXT "A" CHECK IN ACCORDANCE WITH GMM 3.24.1.</P>)