As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE SYS HYD QUANTITY READ ZERO, PRESS ZERO TOO. RED TAB PROC PUMPS TURN OFF 20 MIN. FOUND FLAP PWR UNIT HYD MOTOR LEAKING FROM TOP OF MOUNTING FLANGE AT FLAP PWR UNIT GEARBOX. REMOVED AND REPLACED FLAP HYD MOTOR IN REF TO 727-200 MM 27-51-062-4. OPS AND LEAK CK GOOD. REMOVED AND REPLACED BOTH 1 & 2 HYD CASE DRAIN FILTER PER MM 29-11-062-. OPS GOOD.