As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING GEAR EXT ON APPROACH, C-SYS HYD QTY LO QTY LIGHT ON AND C-SYS PRESSURE DROPPED TO ZERO. HOWEVER, GEAR HAD FULLY EXTENDED, 3 GREEN QTY IN C-SYS DROPPED TO AND REMAINED AT .125 FULL. FOUND C-SYS ATM HYD PUMP LEAKING AT SPLIT LINE. REMOVED PUMP AND REPLACED SAME.