As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, RECIVED A HYD 1 LOW QTY ADVISORY ON THE EICAS. THE LOW QTY WAS CONFIRMED ON THE HYD PAGE OF THE MFD LATER RECEIVED AN E1 HYD PUMP FAIL ADVISORY ON EICAS AFTER PARKING. FOUND HYDRAULIC FLUID DRIPPING OUT OF NR 1 ENGINE COWLING. REMOVED AND REPLACED THE NR 1 ENGINE DRIVEN HYD PUMP IAW AMM 29-10-03 OPS AND LEAK CHECKED GOOD.