As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ISSUE- CREW REPORTED AT APPROX 13,000FT DURING CLIMB OUT IN MIA HYD 1 LO QTY EICAS MESSAGE APPEARED. VERIFIED WITH MFD AND SHORTLY AFTER RECEIVED E1 HYD PUMP FAIL. RAN QRH AND RETURNED TO MIA. ON LANDING RECEIVED SPOILER FAIL AND HOT BRAKES INDICATION DUE TO HYD 1 FAILURE. CORR ACTION- MX FOUND A CHAFED LINE TO #1 ENGINE DRIVEN PUMP. MX R&R'D THE PUMP AND THE HYD LINE LEAK AND OPS TEST GOOD.