As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB TO FL 330, RECEIVED LEVEL 1 HYD 3 ELEV OFF. HYD QTY INDICATED 4.7 GAL. QTY DECREASED TO 2.7 AND RECEIVED HYD 3 OFF. USED ALTERNATE GEAR EXTENSION. NR 3 ENGINE RAN FOR APPROX 25 MINUTES WITH HYD 3 OFF. R & R HYDRAULIC LINE UNION AND CHECK VALVE. GEAR SWING REF AMM 32-31-03-2