What was found
ABOUT 2.5 HRS FROM TOUCHDOWN, GOT LEVEL 1 HYD 3 OFF, FOLLOWED BY LEVEL 2 HYD 3 FAIL. LOST ALL HYD 3 QTY FOLLOWED QRH PROCEDURES AND DID ALT GEAR EXTENSION. A/C TOWED TO GATE FROM RUNWAY. FLEX LINE INSTALLED IN HYD SYSTEM NR 3 LOCATED AT TRIM MOTOR VALVE BLOCK, HORZ STAB REMOVED AND REPLACED NR 3 ENGINE DRIVEN PUMP PER AMM 29-11-20-4 AND CASE DRAIN MANIFOLD FILTERS FOR LT (UPPER) EDP PER AMM29-12-41-2. BLED EDP AND SUPPLY LINES PER AMM 29-03-00-2. DRY MOTOR THE ENG PER AMM 71-00-00-51 AND PERFORMED LEAK CHECK SATISFACTORY.