As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEAK IN HYD SYSTEM NR 3. HYD SYS SELECTED TO MANUAL AND NR 3 HYD PUMP SELECTED OFF AT ABOUT 4.0 INDICATION. SYS QTY CONTINUED TO DROP AT BLOCK IN NR 3 HYD SYS IS AT 0.2. FOUND NR 3 ENGINE LEFT HYDRAULIC PUMP LEAKING AT CASE DRAIN LINE. REMOVED & REPLACED BOTH LEFT & RIGHT ENGINE DRIVEN PUMPS REF MM 29-11-01-2.