What was found
IN CRUISE FLIGHT GOT A HYDRAULIC SYSTEM 2 ADVISORY MESSAGE -LOW QUANTITY. QUANTITY WAS INDICATING 20 PERCENT. OVER THE NEXT 10 MINUTES QUANTITY WENT TO 0 AND WE COMPLETELY LOST SYSTEM 2. COMPLETED QRH PROCEDURE AND DIVERTED TO SFO PER MAINTENANCE REQUEST. GEAR WAS MANUALLY EXTENDED AND A NORMAL LANDING WAS COMPLETED. WE WERE TOWED TO THE GATE. FLUID WAS AT ZERO FOR 25 MINUTES. FLIGHT 3570 - FILED CLOSED FOUND THE #2 ENGINE DRIVEN PUMP NACELLE PRESSURE LINE TO HAVE A CRACK IN IT AT THE LOWER B-NUT FITTING AREA REMOVED AND REPLACED THE HYDRAULIC SYSTEM EDP PRESSURE NACELLE LINE ASSY IN REFERENCE TO THE ERJ 175 AMM. SERVICED THE #2 HYDRAULIC SYSTEM RESERVOIR IN REFERENCE TO THE ERJ 175 AMM PERFORMED LEAK CHECKS NO LEAKS NOTED. ALSO PERFORMED THE ENGINE -DRIVEN PUMP RUNS DRY INSPECTION/CHECK REFERENCE FORWARD DISCREPANCY PLEASE REFERENCE AML 414520 PLEASE REFERENCE AML 414521 FOR MX PERFORMED