As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER 1.5 HOURS OF FLIGHT, EXPERIENCED LOSS OF HYDRAULICS. PRESSURE DROPPED TO ZERO ACCOMPANIED BY AILERON AND RUDDER CONTROL MANUAL LIGHTS. ISOLATED SYSTEM PRIOR TO QUANTITY REACHING STANDPIPE LEVEL. FOUND NR 3 ENGINE HYDRAULIC PRESSURE LINE LEAKING NEAR HYDRAULIC PUMP. REPLACED PRESSURE LINE, SERVICED MAIN HYDRAULIC RESERVOIR AND OPERATIONALLY CHECKED NR 2 AND NR 3 ENGINES AND AUX PUMPS. OPS CHECKED GOOD. NO LEAKS NOTED.