As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MESSAGE CTR HYD PRESS RESERVOIR AND RESERVOIR LIGHT. QTY DROPPED FROM 1.08 TO 1.05 AND AS LOW AS .99. FOUND RESERVOIR PRESS READING LOW. REPLACED HYD RESERVOIR PRESS MODULE, CHECKED GOOD. CREW REPORTED THAT LIGHT AND MESSAGE WENT OUT 15 MINS AFTER THEY DIVERTED.